Conor O'Shea has described Harlequins' loss to Exeter Chiefs in the Aviva Premiership yesterday as frustrating.

A strong second-half performance from Exeter saw them register a 27-16 win over the league leaders.

Quins director of rugby told Sky Sports News: "That's the second time we've been outmuscled by Exeter. There was never any massive intensity or energy in our play as they held on to the ball and won all the collisions.

"I'm frustrated as every time we edged in front we conceded a penalty, but all credit to Exeter as they kept coming and coming and ramped it up at the end.

"We were tired out with all the tackling we had to do as a result of coughing up possession."

"I'm frustrated as every time we edged in front we conceded a penalty, but all credit to Exeter as they kept coming and coming and ramped it up at the end. When we lost at Exeter in October we went on a winning run of 10 games so we learn our lessons well."

Harlequins remain a point clear at the top of the Premiership table.