Fourteen-man Bath Rugby picked up a try bonus point in a 39-29 defeat to Wasps at the Ricoh Arena.
Thomas Young and Josh Bassett scored either side of a Miles Reid effort to see the Coventry-based outfit ahead at the break before Michael Le Bourgeois extended their lead on 47 minutes.
Tries from Josh McNally, Beno Obano and Ben Spencer turned the game on its head but Obano saw red late on ahead of two late Wasps tries which sealed the result.
Wasps set their attacking stall out from minute one and enjoyed the lion’s share of the ball in the opening exchanges, though they found a resolute and stubborn Bath defence in their way.
Joe Cokanasiga began a personally solid first half with a big hit in the wide channel and Cam Redpath swooped in for a turnover and relieve the early pressure.
The hosts did edge ahead soon after as they continued on the front foot. Kicking to the corner from the halfway, the pack hit the fringes for several phases inches from the line before Young brushed the whitewash.
Le Bourgeois made a clean break as Wasps threatened once more and but for a pass to the deck, Dan Robson would have added to their tally.
Bath showed how dangerous they could be on the decent Ricoh track on the quarter as Zach Mercer picked from the base of the scrum and fed Jonathan Joseph on a long jink to the 22.
Then Cokanasiga sneakily carried from a ruck and released Will Chudley on a trot but the scrum-half couldn’t quite find the angle to set Reid away.
Miscommunication at the line-out resulted in Bath letting a chance slip deep in Wasps territory before patience saw the away side cross for the first time.
A number of white shirts flocked to a five-metre maul, sending it rolling on and after some physical phases, Reid finished low for his second try in as many games.
Wasps almost replied when Paolo Odogwu got the luck of the bounce to scoot in behind but chose to dart inside rather than use men outside him and Reid made sure any chance of a home score was dented with an incredible jackal.
However, Umaga kicked three points ahead of sending Bassett on a sprint to five points as Wasps ended the half on top.