By JON NEWCOMBE

Working on defence: Tabai MatsonFOR all their attacking credentials, defence remains a massive focus at Harlequins as the reigning champions look to sign off the first block of Premiership matches with a win at Wasps.Defeats to Sale Sharks and, most recently Saracens, and a below-par first-half performance in the win over Bath, suggest the upcoming break for the Premiership Cup is a timely one.Quins are still third in the table, so there’s no sign of any unease, but head coach Tabai Matson knows they need to reduce their 25 points-per-game-conceded average i...