Harlequins clinched their third win in Pool 5 of the European Rugby Challenge Cup with a five-try showing to see off plucky Grenoble 38-20 at The Stoop.

They looked like running away with matters when they led 28-5 just past the half-hour mark but Grenoble never gave in and reduced the deficit to 28-20 in the second half before Harlequins clinched it.

Scrum-half Danny Care had set the home side on their way when he raced away to score after 12 minutes and full-back Mike Brown added a second try four minutes later.

Winger Cadan Murley and hooker Max Crumpton also went over for tries before the break but Grenoble kept in contention.

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Full-back Gervais Cordin scored a brace for the visitors to add to the opening try of the game by forward Antonin Berruyer after only three minutes.

Fly-half Ben Lucas added a second half penalty to an earlier conversion and the outcome was back in the balance at 28-20 before Harlequins strong finish.

Replacement James Lang eased home concern with a penalty 15 minutes from time and then converted after number eight Alex Dombrandt plunged over at the death to seal the points.

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Quins were also indebted to the boot of fly-half Marcus Smith who improved all his side first half tries.

Harlequins will aim to clinch top spot at Agen next Friday evening while Grenoble have home advantage against Benetton.