By BEN JAYCOCK

Harlequins face the toughest run-in of the Premiership’s top four contenders and director of rugby Billy Millard knows he must shore up his side’s leaky defence.
The league’s entertainers face last season’s finalists Sale next Sunday afternoon at the Salford Stadium before facing Northampton in their big match at Twickenham.
They then face sixth-place Exeter at Sandy Park in the penultimate round – who have lost at home just once in the Premiership this term – before Harlequins finish their regular season at home to top four dark horses Bristol, who are flying off the back ...