Sorry @killabeezh I didn't see this before the matches. In hindsight I would say the Man U vs Sevilla match overall was a lot more open than I expected, so you were a bit unlucky there.
The Roma vs Shakhtar game was different, very tight. Once Roma got the lead they were happy to keep it, so more goals were difficult (I had an inplay bet on Roma to get lots of second half corners when it was 0-0, but when they scored early in the 2nd half that ended my chances!)