Tottenham moved up to third and seriously dented Arsenal's Top Four hopes after a crucial 2 - 1 win at White Hart Lane.
Spurs took the decisive step midway through the first half with two goals in as many minutes.
The inform Gareth Bale opened the scoring for Spurs after 37 minutes after breaking through Arsenal's high line and dinking the ball past Wojciech Szczesny.
And two minutes later Aaron Lennon repeated the trick finding himself one-on-one with the Polish goalkeeper before rounding him and finishing clinically.
Arsenal rallied in the second half as Per Mertesacker pulled one back. But they were unable to grab that crucial equaliser as the Gunners fell seven points behind their North London rivals.