It ended a bad week in the worst possible fashion for Wasps, who are not only facing up to the threat of administration but also saw relegation rivals Newcastle win at Gloucester, 29-20, to move within four points of them at the bottom.
Robshaw wasn't the only England player celebrating with fly-half Toby Flood toasting a vintage day at the office -contributing 25 points to a 35-21 win over Northampton Saints.
England wing Chris Ashton, tryless in the Six Nations, was among the scorers while international scrum-half Lee Dickson notched the Saints' other try.
That win saw Leicester leapfrog Saracens into second in the table despite the Vicarage Road outfit beating London Irish 28-19.
Another of England 's fly-half's Charlie Hodgson was among the points, kicking 23 points while Delon Armitage crossed twice for the Exiles.
Meanwhile Exeter beat Worcester 31-26 to leapfrog Northampton into the final semi-final berth with two games of the season remaining.