Sam Smith scored two tries to help Harlequins secure a 35-9 bonus-point victory over Newcastle Falcons on Sunday.
Saracens left it late, but a George Kruis try five minutes from time secured the Fez Heads a fifth straight Premiership home win 24-19 at the expense of Sale Sharks.
Leicester Tigers moved into the Premiership top four with a 22-17 victory over Gloucester at Kingsholm on Friday.
Former England captain and Saracens skipper Steve Borthwick has announced he will retire at the end of the season.
There will be four Premiership matches played at the same time on Saturday as the chasing pack look to close the gap on Saracens.
Springbok loose forward Ashley Johnson knows that he can't be complacent or his place in the London Wasps starting line-up will be challenged.
English wing Topsy Ojo has signed a three-year contract extension with London Irish, the English Premiership club announced on Wednesday.
Northampton Saints stood their ground in the wake of media reports regarding a possible investigation about the club releasing star wing George North.
Northampton Saints could be fined for releasing George North to play for Wales against the Wallabies on Saturday.
Tongan tighthead prop Sila Puafisi has signed for English club Gloucester.