Harlequins secured their 10th successive Aviva Premiership win with a 22-16 victory over Wasps at Adams Park.
The visitors took an early lead when Matt Hooper touched down in the fifth minute before Nick Evans kicked the extras.
Nick Robinson kicked a penalty soon after to put Wasps on the scoreboard before another kick on half time made the score 6-7 at the break.
A penalty from Evans after the interval edged Quins ahead before two tries from Mike Brown and Luke Wallace established a 22-6 lead for the away team.
However, when Matt Hooper was sent to the sin bin Wasps staged a fightback as tries for Hugo Southwell on 64 minutes and Tom Varndell six minutes later set up a nervy finale for the league leaders.
