Thursday night couldn't have gone much worse for Arsenal. It was a night in which they could have made a real statement - travelling to their bitter north London rivals, knocking them out of Champions League contention and confirming it for themselves.
It would have been the first time Arsenal will have secured a UCL spot for six years, and whilst they're still in pole position to do so, they've let Spurs right back in it with the defeat.
Wins over Newcastle United and Everton will ensure that the loss to Spurs will mean nothing, and getting the fourth spot, but they'll likely need to do so with Tottenham having a favourable schedule as they face Burnley and Norwich. Here, we take a look at who could be on the Gunners' shopping list with a round-up of the day's transfer news:
