The students triumphed 8-6 in a match that was spoiled by torrential rain in the first half.
The conditions at the start of the game made handling very tough and with mauls not allowed due to Covid-19 it meant possession changed hands plenty of times and chances were few and far between.
The university did go in front with a penalty on 20 minutes and that was the only scoring in a first half to forget.
Sammy Matts pulled OPMs level with a penalty on 52 minutes before putting his side in front for the first time with another well-struck kick six minutes later.
But just as the hosts looked to be getting on top, the university scored a breakaway try when Dylan Evans beat two OPMs players to a kick to gather and score the game’s only try.
OPMs could have won it in the final 10 minutes, but a Matts penalty just dropped short when it looked like it was going over.
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