A stunning comeback by Wasps at the Causeway Stadium was held at back by Leicester.
The Tigers were 22-6 ahead within the first 20 minutes with tries from Lewis Moody, Geordan Murphy and Martin Corry.
European Champions Wasps fought back with a Josh Lewsey try and Mark van Gisbergen’s boot, they were 31-31 with five minutes to go!
Andy Goode kept his cool and kicked the Tigers to victory with a penalty and a drop goal.
The closing minutes saw Leicester desperately defending as Wasps aimed for the try they needed, as Williams controversially blew the full-time whistle.
To score three tries against the European champions at home was also something I am pleased about.”
Wasps: Van Gisbergen; Lewsey, Erinle, Abbott, Voyce; King, Dawson; Dowd, Greening, Green; Shaw, Birkett; Worsley, O’Connor, Dallaglio (capt).
Replacements: Gotting, McKenzie, Lock, Hart, Biljon, Brooks, Hoadley.
Leicester: Murphy; Rabeni, Smith, Gibson, Healey; Goode, Ellis; Rowntree, Chuter, White, M Johnson (capt), L Deacon; Moody, Back, Corry.
Replacements (from): Buckland/Cockerill, Morris, Kay, W Johnson/B Deacon, H Tuilagi, Bemand, A Tuiliagi, Lloyd, Vesty.
Wasps: 31 (19)
Cons: Van Gisbergen
Pens: Van Gisbergen (8)
Leicester: 37 (25)
Tries: Moody, Murphy, Corry
Cons: Goode (2)
Pen: Goode (5