Leinster player ratings: After a slow start, Leinster simply blew Harlequins away at Croke Park, recording a frankly embarrassing 62-0 hammering for the ages.
Leaders Bath maintained their imperious form in the Gallagher Premiership with a 47-28 victory over Harlequins in front of another sell-out crowd at the Recreation Ground.
England lock Ollie Chessum will return to Leicester Tigers' starting XV on Sunday as his side host Saracens in the Gallagher Premiership.
England captain Maro Itoje will return to captain a Saracens side containing four of his international team-mates during the Guinness Six Nations when they host Harlequins in the Gallagher Premiership on Saturday.
Harlequins saw their Investec Champions Cup campaign drift worryingly close to the rocks courtesy of a 33 - 14 defeat at the hands of Toulon.
Ben Waghorn was a starter in the World Rugby U20 Championship final last July in Cape Town with Lucas Friday appearing off the bench against the French.
Round six of the Gallagher Premiership promises to deliver another thrilling weekend of action, with teams looking to solidify their positions ahead of a break before the Test rugby returns in November.