Leandro Trossard rekindled Arsenal's Premier League title hopes with the winner as they came from a goal down to beat north London rivals Tottenham Hotspur 2-1 at home on Wednesday.
Starting the derby seven points behind leaders Liverpool in third place, things looked bad for the hosts when Son Heung-min's deflected volley gave Tottenham a 25th-minute lead against the run of play.
The mood changed quickly before halftime though as Gabriel's header from a Declan Rice corner deflected in off Tottenham forward Dominic Solanke in the 40th minute.