Harlequins captain Chris Robshaw has claimed that the team must improve following their "lucky" win over London Wasps in the Aviva Premiership.

Andy Goode missed a last-gasp conversion for Wasps at Twickenham Stadium as Quins opened their campaign with a 16-15 victory on Saturday.

"It was a very tense match and we were very lucky that kick missed right at the end," Robshaw is quoted as saying on the league's official website.

"We were not really at full speed and we are going to have to really lift our game. We got away with it but you can't argue with starting your season with four points."

Quins return to league action on Friday when they welcome Northampton Saints to Twickenham Stoop.