Chadli played internationally forMorocco in 2010 as his father is of Moroccan descent,[4][5] but switched allegiance to Belgium the following year. He has earned over sixty caps for Belgium and represented the nation at theFIFA World Cup in2014 and2018, as well as atUEFA Euro 2020.
Chadli played his youth football at JS Thier-à-Liège,Standard Liège andMVV Maastricht.In the summer of 2007, he was contracted by Dutch second division clubAGOVV Apeldoorn, who scouted him atMVV's youth academy. Here he was considered an emerging talent. While Chadli was being tested by AGOVV, he went under the alias "Kaliffe", because technical manager Ted van Leeuwen was afraid other clubs would show their interest.[6] Chadli scored his first goal in professional football for AGOVV in a match againstFC Volendam.
In the summer of 2010, Chadli signed withFC Twente, and in the ensuing season became a first team player for the then reigningEredivisie champions.[7]His first Eredivisie goal was the winning one away at title rivalsPSV.[8]He made his European andChampions League debut in a 2–2 home draw againstInternazionale on 14 September in the competition'sgroup stage.[9]On 29 September, he scored his first Champions League goal away atTottenham Hotspur (4–1),[10] and on 2 November scored his second atWerder Bremen in a 0–2 away victory.[11] He later scored again in the Champions League against Tottenham from a free-kick on 7 December, the goal securing a draw for Twente at home, 3–3.
On 21 July 2013, Tottenham Hotspur agreed a deal with Twente to sign Chadli for a transfer fee of £7 million.[12] The club confirmed that subject to agreement of personal terms and a medical, Chadli would join the Spurs squad for pre-season training inHong Kong.[13] On 23 July, the club confirmed that Chadli had joined the squad which was participating in training sessions prior to the club taking part in the2013 Premier League Asia Trophy.[14] Chadli finally agreed terms on 26 July and became an official Tottenham player, later making his Spurs debut in a 5–2 friendly defeat toAS Monaco on 3 August.[15] He made hisPremier League debut on 18 August, the first match of the2013–14 season, againstCrystal Palace in a 1–0 win,[16] then scored his first Premier League goal on 12 February 2014, a 0–4 win away toNewcastle United.[17]
On 24 August 2014, the second matchday of the2014–15 season, Chadli scored twice as Tottenham defeatedQueens Park Rangers 4–0 at home.[18] This was the start of a run of good form for Chadli, who went on to score several goals, including one against Tottenham'sNorth London rivalsArsenal. The run of form, however, was cut short by injury, and before he could return to form, tragedy struck his family after his father died.[19] Chadli slowly returned to form, scoring two goals in two matches against Newcastle United andSouthampton, respectively, in late April to take his season total to 12, ten in the Premier League. Chadli increased his tally to 11 Premier League goals by rounding the goalkeeper in a 2–0 victory againstHull City on 16 May 2015.
On 29 August 2016,West Bromwich Albion agreed a deal with Tottenham Hotspur to sign Chadli for a club-record transfer fee of £13 million.[20] He made his debut in a 1–0 defeat toBournemouth.[21] Chadli scored twice and got two assists on his home debut, only his second league appearance for the club which ended as a 4–2 win overWest Ham United.[22]
In2017–18, Chadli was troubled by recurring thigh injuries and made only three appearances by the end of April in a West Bromwich Albion side that was eventually relegated.[23] Totalling five appearances, he scored once, a free kick in a 1–1 draw atLeicester City on 16 October 2017.[24]
On 30 August 2018,Monaco announced the signing of Chadli on a three-year deal.[25] They paid more than €12 million to West Bromwich Albion to secure the services of the multipurpose midfielder. At the club he was united with fellow Belgium national team player,Youri Tielemans. Chadli competed in the Champions League with Monaco. InLigue 1, however, he had an unsuccessful season, as Monaco struggled against relegation from the league throughout the competition, only securing it at the end of the season. At Monaco, Chadli played only 1,058 minutes and neither scored a goal or made an assist in all competitions.[26]
On 11 August 2019, Chadli joinedAnderlecht on a season-long loan from Monaco after having been sidetracked at the French club.[27]Player-managerVincent Kompany was able to persuade Chadli in coming to theBelgian First Division A. After Kompany andSimon Mignolet, he was the third Belgian international to return to Belgium to play.[28] Anderlecht took over his entire contract (more than €230,000 gross per month) from Chadli at Monaco.[29] With the experienced Chadli, and a number of other experienced signings, Anderlecht wanted to invest to lift their youngsters to a higher level.[30][31]
On 17 August 2019, he made his debut for Anderlecht in a 4–2 loss toKortrijk. The match also marked his debut in the highest Belgian division, which he had left at the age of 17. Despite his injury problems, Chadli was one of the highlights of the club that season. He managed to score eight goals and give five assists in 17 league appearances.[26] However, Anderlecht did not sign him on a permanent deal as the loan expired, as the club did not have the finances.[32]
On 10 September 2020, Chadli moved to Turkish clubIstanbul Basaksehir.[32] He signed a two-year contract with the club, and was assigned jersey number 11.[33] Başakşehir were the defendingSüper Lig champions and had thus qualified directly for the group stage of the Champions League. At the point of signing, he still had one year left of his deal with Monaco, but did not have any prospects of playing time there. At the club, he was reunited with a number of fellow former Premier League players, includingMartin Škrtel andDemba Ba.[34]
On 8 November, Chadli made his first appearance for Başakşehir, in a league match againstGençlerbirliği, after having been injured during the first two months of his tenure at the club. He came on as a substitute forDeniz Türüç in the 79th minute, as Başakşehir were down 0–1. Chadli went on to contribute heavily to his club's win, giving two assists as the team turned around the game to secure a 2–1.[35]
On 6 September 2022, Chadli joinedBelgian Pro League clubWesterlo on a season-long loan.[36] On 18 August 2023, Chadli returned to Westerlo on a permanent basis with a one-season contract.[37]
A dual citizen of Belgium and Morocco, Chadli was thus able to represent either nation. He made his debut forMorocco on 17 November 2010, in a 1–1 friendly draw againstNorthern Ireland atWindsor Park,[38] and was named man of the match.[39] On 28 January 2011, however, he announced his intention to representBelgium at the international level, which was permitted because he had not yet played in a competitive match for Morocco. He made his debut for the Belgian squad for a 9 February friendly match againstFinland.[40]
On 26 May 2014, Chadli scored what would have been his third international goal in a pre-2014 World Cup friendly againstLuxembourg. The match, however, was later recognised invalid as coachMarc Wilmots had made seven substitutions instead of the permitted six.[42]
On 13 May 2014, Chadli was named to Belgium's squad for the 2014 World Cup.[43] He started in midfield but was substituted at half time forDries Mertens in the team's first game of the tournament, a 2–1 win overAlgeria inBelo Horizonte.[44]
On 2 July 2018, Chadli came off the bench to score the winning goal in injury time to lift Belgium to a 3–2 victory over Japan in the round of 16 of the 2018 FIFA World Cup.[46] The goal is chosen by the BBC panel as goal of the tournament in the 2018 World Cup.[47]
Chadli is a versatile midfielder who can play as an attacking midfielder, in anumber 10 role, or as a winger on either flank. He is comfortable on both feet and has a good shot at his disposal.[48]
^On 25 September, he scored his first goal for Tottenham in a 4–0 League Cup victory over Aston VillaChadli Deal Agreed, Tottenham Hotspur F.C., 26 July 2013
^Calcoen, Pieter-Jan (11 August 2019)."Chadli trekt voor één jaar naar Anderlecht: "Nacer maakt het team compleet"".Het Laatste Nieuws (in Dutch). Retrieved27 December 2020."We werkten de afgelopen maanden hard aan de opbouw van de ploeg. We zetten volop in op de jeugd, maar investeren ook in een aantal ervaren spelers om de jongeren naar een hoger niveau te tillen. Chadli is daar één van", legt sportief directeur Michael Verschueren uit.