Arsenal boss Arsene Wenger believes Tottenham could end Chelsea's title bid this weekend.
He told arsenal.com: "I watched the [Villa v Spurs] game. When you are in a position where you absolutely have to win the game it makes the game more difficult. When you are 1-0 down that becomes even more difficult.
"Spurs are a good team, they have shown that they can beat anybody in the league on their day. I feel they are improving as a team and that's why they can make it difficult and I think they have a chance against Chelsea on Saturday."