London Irish stand-in captain Bob Casey:
"It's a measure of how far we have come since last season that the boys are devastated down in the changing room.
"We played the past European champions today, and we should have won that game.
"But there's a lot of encouragement to be taken, especially the lineout contesting, which was excellent."
Wasps director of rugby Ian McGeechan:
"You are having to chase the game if you haven't got possession. It becomes a difficult game when you don't have the ball.
"But I thought we dug in well to win the game."
London Irish: Armitage; Staniforth, Penney, Geraghty, Bishop; Everitt, Hodgson; Collins, Paice, Hardwick; Casey, Kennedy; Gustard, Danaher, Leguizamon.
Replacements: Ojo for Bishop (40), Hatley for Collins (67), Strudwick for Casey (40), Murphy for Leguizamon (67).
Not Used: Flavin, Willis, Flutey.
Wasps: van Gisbergen; Sackey, Waters, Erinle, Voyce; Brooks, Reddan; Payne, Gotting, Bracken; Hart, Birkett; Worsley, O'Connor, Lock.
Replacements: Lewsey for Waters (60), King for Brooks (74), Dawson for Reddan (64), Barratt for Gotting (68).
Not Used: Dawson, Skivington, Chamberlain.
Ref: Ashley Rowden (RFU).