HIA for Thomas

Change of direction and Madigan plays Marshall who is through the gap to score

Ulster keep it tight

Andrew peels off the maul

Ulster look to maul 6m out

Walsh slices it away to touch

Ospreys look to run from deep, loose pass

Madigan gets the match underway for Ulster

Dan Lydiate and Stephen Myler are ruled out. Morgan Morris and Jack Walsh come into the starting lineup and Harri Deaves and Cai Evans come onto the bench.

Ulster hosts the Ospreys in round 4 of the United Rugby Championship. Ulster has won two of their three matches to sit in fourth position in the table, while the Ospreys have recorded a win, a loss and a draw to lie in eighth spot in the standings.