Harlequins coach John Kingston admitted conditions made it tough to look impressive as the Aviva Premiership leaders slogged to a 23-6 win over London Welsh in the LV= Cup.
Quins moves to the top of Pool 1 but the scoreline flattered the home side in a scrappy match which saw both sides regularly turn the ball over.
But Kingston felt there were plenty of mitigating factors, as he said: "Some of our boys were a little bit rusty as they haven't played a lot of meaningful rugby in recent weeks.
"The pitch was very tacky and with snow on it all week it had become heavy and difficult to play on."
He also praised lock Olly Kohn in the wake of his call into the Wales squad, adding: "When the squad found out he had Welsh grandparents they pushed him in the right direction.
"He is an unsung hero, steps back out of the limelight and has given his heart to Quins over a number of years. If called up, he'll do incredibly well as he plays his rugby at the highest level and never takes a backward step."
London Welsh coach Lyn Jones added: "We are disappointed because we deserved more. It was a competitive match and we knew we had to be physical to stop them. They are a hugely skilled side and had a bit more speed than us.
"We got promoted and were entered for three competitions, only one the Premiership is important to us at this stage.
"Maybe in two or three season's time we can be more competitive in the LV and Amlin but at the moment it gives us an opportunity to rest our players."