Gloucester overpowered Celtic League champions the Ospreys to start their Powergen Cup campaign with a solid if uninspiring victory at Kingsholm.
Wing James Simpson-Daniel crossed for a try within two minutes and two penalties from Ludovic Mercier helped the hosts to a 13-7 interval lead.
Flanker Steve Tandy replied with a try for the Ospreys, but their discipline let them down in the second half.
Another Mercier penalty and a Henry Paul try saw Gloucester home.
The Ospreys suffered a dreadful start when some woeful defensive alignment allowed Gloucester a try inside the opening two minutes.
Fly-half Mercier looped around Paul from a scrum and a simple inside pass saw Simpson-Daniel scythe through the cover to score.
"We felt pretty controlled throughout the whole game"
They played the more adventurous rugby and were rewarded when impressive scrum-half Jason Spice darted through the remnants of a lineout after 20 minutes.
The New Zealander was held up short, but his pop-up pass out of the tackle saw flanker Tandy dive over for a score that Matthew Jones improved.
Mercier extended Gloucester's lead with another penalty, but was off target with two more before the interval as the Ospreys stayed in touch playing against the wind.
"I was very disappointed with our second-half performance"
Lock Andy Newman was fortunate not to be yellow-carded after pulling down Alex Brown in a line-out, but wing Richard Mustoe was sin-binned on the hour for a ruck infringement as referee Roy Maybank's patience ran out.
Despite their forward dominance Gloucester only had a further Mercier penalty to show for it until 10 minutes from time.
Finally, after hammering away at the Ospreys line for fully 10 minutes, Paul scooped up Simpson-Daniel's chip through to dive over and seal victory.
"We felt pretty controlled throughout the whole game, but we made a few mistakes.
"The Ospreys are quite dangerous and off-load really well, and looked like they were going to score tries.
"Although we made a few too many mistakes we still came away with a good win so we are very happy."
"I felt we played the better rugby in the first half against a strong wind, and everything went according to plan.
"But I was very disappointed with our second-half performance. Things fell apart for us and once the set-piece went we failed to control the game.
"Their fly-half played very well but we have to get our first phase sorted out and double up with a better kicking game."
Gloucester: Goodridge; Foster, Tindall (capt), Paul, Simpson-Daniel; Mercier, Thomas; Wood, M Davies, Powell; Eustace, Brown; Boer, Hazell, Forrester.
Replacements: Replacements: Sigley for Wood (62), Narraway for Forrester (78), Cornwell for Boer (80).
Not Used: Azam, Richards, B Davies, Thirlby.
Ospreys: Connor; Mustoe, Parker, Davies, Vaughton; M Jones, Spice; D Jones, B Williams (capt), A Jones, Cockbain, Newman, Bateman, Tandy, Beech.
Replacements: A Bishop for Vaughton (12), Millward for A Jones (51), Pugh for Tandy (62), James for D Jones (65), Bennett for B Williams (74), Evans for Cockbain (74), Wells for Newman (80).
Referee: Roy Maybank (Kent)