Wasps ended Northampton's unbeaten start to the season with a 26-20 win in a pulsating derby at Coventry.
Sam Matavesi's try put Saints ahead, but Zach Kibirige levelled before Dan Biggar and Jacob Umaga traded penalties as a tight first half ended 10-10.
Umaga booted Wasps ahead for the first time before Thomas Young's offload put Dan Robson over to make it 20-10.
Lewis Ludlam cut the gap, but two Jimmy Gopperth penalties sealed the win despite James Fish's last-gasp score.
More to follow.
Wasps: Watson; Kibirige, Spink, Le Bourgeois, Bassett; Umaga, Robson; Harris, Cruse, Scholtz, Fifita, Stooke, Shields (capt), Young, T Willis.
Replacements: Oghre, Hislop, Toomaga-Allen, Gaskell, Carr, Porter, Gopperth, Crossdale.
Sin-bin: Oghre (62 mins).
Northampton: Furbank; Freeman, Proctor, Dingwall, Sleightholme; Biggar, Mitchell; Auterac, Matavesi, Hill, Ribbans, Ratuniyarawa, Lawes, Ludlam (capt), Augustus.
Replacements: Fish, Waller, Painter, Coles, Harrison, Lomani, Hutchinson, Moon.
Referee: Craig Maxwell-Keys (RFU).
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