Sunderland's hopes of securing automatic promotion from League One suffered a major blow as they crashed to a remarkable 5-4 defeat by Coventry.

Substitute Conor Chaplin struck in the 78th minute at the Stadium of Light to leave the Black Cats two points behind second-placed Barnsley with a game in hand.

There were six goals in a chaotic first half, with Coventry claiming a 12th minute lead when Bright Enobakhare capitalised on an error from Luke O'Nien to slot home a low finish.

The hosts levelled when George Honeyman's shot took a huge deflection to beat goalkeeper Lee Burge, but the visitors regained their lead three minutes later as Luke Thomas' through ball enabled Amadou Bakayoko to break clear and score.

The Sky Blues went further ahead midway through the first half when Enobakhare teed up Jordy Hiwula to fire home a shot that took a hefty deflection off Jack Baldwin.

Sunderland were all over the place at that stage, yet they gained a foothold when Burge made a mess of trying to punch a cross from Bryan Oviedo, enabling Charlie Wyke to roll into an empty net.

And the Black Cats were level on the stroke of half-time when Wyke nodded down Oviedo's cross for Will Grigg to stab home from close range.

There was no let up in the action in the second half and Coventry reclaimed the lead within 10 minutes of the restart. Bakayoko teed up Jordan Shipley, who found the bottom right-hand corner from 20 yards.

Sunderland hit back again to level things up at 4-4 when substitute Aiden McGeady set up Max Power for another effort that found the net via a deflection.

However, Coventry had the final say with 12 minutes left. Tom Flanagan failed to cut out Charlie Wakefield's cross and Chaplin turned neatly before rifling into the roof of the net.

Sunderland's first home league defeat of the season saw their 19-match unbeaten run in League One come to an end.

Match report supplied by the Press Association.