But as much as it was the victory that pleased Dimaond and coach Bryan Redpath, the fact so many players took the chance to play to their full potential was the most encouraging factor. Now Diamond and Redpath have a big, but happy, selection problem ahead of next week's showdown at Sixways.
"There were some individual performances that were very good. I thought that Andre Ostrikov and Ross Harrison played exceptionally well in the forwards and we managed to dominate the game," said Diamond after the win.
"In the Premiership there is not a lot of flash rugby played because of the pressure of relegation, but we tried to spread the ball a little bit in the second half. We didn't manage to do it that well, but we're happy with the result.
"We talked before the game about the lads who haven't made it in the squad over the last couple of weeks and they'd knocked on my door and asked the question, why? They were given the opportunity and they put their hands up really well.
"It makes it very difficult for Bryan choosing the side over the next couple of weeks and that's what we want as coaches. Competition is great."
Diamond also singled out skipper Dan Braid for special praise after the former All Blacks flanker produced another back row masterclass.
"Dan Braid is a class player and a great bloke. He leads well not just as a captain off the field, but on the field he is inspirational," added Diamond.
"From the day he touched down in Manchester he got his boots on, played straight away and he has never looked back. He's been a huge influence and a great lad to have around.
"It was a happy changing room after the game. We had a good few weeks in the Premiership and we managed to carry that momentum into this opening game in Europe.
"After Xmas last year we got our act together and I think we won seven of our last 10 games. We just carried on through the summer with that momentum. All the boys have bought into the game plan that Bryan Redpath and myself are preaching."