After recording two penalties in the first-half, 28-year-old Lozowski crossed in the 43rd minute for Mark McCall’s men before improving his own score for his first of three conversions for the visitors.

Hooker Tom Woolstencroft and then England international Maro Itoje dotted down in the final 10 minutes for the three-time European champions at Franklin’s Gardens.

Meanwhile, tries from Ruan Ackermann and Santiago Socino were not enough for fellow EPCR Challenge Cup side Gloucester Rugby as they were beaten 20-17 by Harlequins at the Kingsholm Stadium.

At Mattioli Woods Welford Road, there was disappointment for Dean Richards, the former Leicester Tigers great, as his Newcastle Falcons side failed to score on their way to a 31-0 defeat against Leicester.

In the TOP 14, Section Paloise prevailed 43-20 winners over fellow EPCR Challenge Cup contenders CA Brive and Lyon beat Racing 92 37-35 at the Matmut Stadium.

Alex Lozowski kicked 20 points as EPCR Challenge Cup side Saracens beat Northampton Saints 30-6 in the Gallagher Premiership on Sunday.