South African hooker Schalk Brits went from villain to hero as Saracens beat Exeter 23-10 in the English Premiership.
Harlequins missed the chance to secure their position in the top four of the English Premiership when they went down 25-20 to Gloucester at Kingsholm on Saturday.
Two tries by former Bulls back-row Gerrit-Jan van Velze helped Northampton to a 30-14 win over Worcester and a return to the top of the English Premiership log.
Saracens returned to the top of the English Premiership with a dour 15-10 win over Sale on Friday night.
Saracens lost their place at the top of the English Premiership log with a surprise 22-13 defeat by lowly London Irish.