Sam cross replaces Lydiate on the starting line up

Late team change for Ospreys sees Lydiate drop out with a back injury. Guy Mercer takes his place in the starting lineup and Sam Cross comes onto the bench.

Hello and welcome to Ultimate Rugby's live coverage of this Champions Cup clash between Saracens and Ospreys at Allianz Park. The defending champions come into this game off the back of a whopping 57-13 victory over Northampton last weekend and will be keen to make it 2/2 tonight. Ospreys on the other hand come into this game having suffered a narrow margin victory to Clermont last time out and will be hoping to bounce back to winning ways this evening. Stay tuned for live commentary and score updates ahead of what promises to be a cracker!