Tottenham's impressive form in pursuit of Chelsea will make the Premier League leaders nervous, according to Stamford Bridge legend Frank Lampard.
Spurs beat Bournemouth for a seventh straight league win and moved to within four points of Chelsea before the Blues meet Manchester United on Sunday.
"Chelsea are very aware that Spurs are there and it'll be a tough game for them tomorrow," Lampard told BBC Sport.
"There will be some nervousness but so there should be."
Lampard was speaking to BBC Final Score and will be a part of the analysis team on Match of the Day on Saturday.