STEVE Diamond believes Sale Sharks Premiership Rugby Cup final victory over Harlequins will put them in good stead for the remainder of the campaign as they chase a domestic double.

The Sharks battled back from 19-10 down – having lead 10-0 at one stage – to lift the cup at the AJ Bell Stadium.

And the director of rugby warned that his side don’t actually know who good they can be.

The Sharks are currently fourth in the Gallagher Premiership table with two games remaining – at Northampton Saints next Tuesday before completing the regularly season at home to Worcester the following weekend.

Diamond will be looking for two victories to seal a top four spot and a place in the end of season play-offs.

“We had a good first 20 and last 20 and we had a bit of luck in it and finally got over the line so I am delighted for the lads,” said Diamond, whose side lifted their first piece of silverware since 2006.

After a bright start, the Sharks' lack of discipline – where they gave away seven successive penalties – saw them trail 19-10 going in to the final quarter of the game.

But Diamond was happy with the composure his side showed to turn the game around.

“We just had that little bit of calmness at half time,” he said.

“Second half, after the first 10 minutes, we got hold of it, we had a few balls that went down but we stuck at it and it will serve us well for the next two weeks

“They showed a lot of composure so I am delighted but sometimes I don’t think we know how good we can be. It will serve us well for Northampton and Worcester in the last throws of the Premiership.

"If we get out basics right, it will take a good team to beat us.”