Come on, mate... we can't be over-officiating every bit of contact on a 50/50. Biss was stronger in the challenge.Clear foul by Biss on our first. That's never a pen on Romero, but Udogie's foul on their guy is. Romero could (should?) have been sent off for that off the ball incident. Ref was homecooking all night long. We'd be fuming if that had gone the other way round.
The pen on Romero was soft but always given by UEFA refs. They're hard and fast on those rules.