Saracens' star players would still be able to play for England even if they are relegated from the Premiership to the Championship.

Saracens, Northampton, Gloucester, Glasgow and Ulster are set to duel it out for three quarter-final spots in the final round of pool matches in the Champions Cup.

Jamie Roberts says he has told Wales coach Wayne Pivac he is still available despite moving to South Africa.

Harlequins prop Will Collier renews his contract with the Premiership club.

Saracens are facing relegation from the Premiership if they are found to have breached the salary cap again.

Team news as Worcester host Castres in Friday's European Challenge Cup fixture at Sixways (20:00 GMT).

Team news as Lyon host Northampton Saints in Saturday's Champions Cup fixture at Matmut Stadium de Gerland (13:00 GMT).

Marty Moore is ruled out by injury for Ulster's vital European Champions Cup game against Bath but Will Addison is passed fit.

Team news as Saracens host Racing 92 in Sunday's Champions Cup fixture at Allianz Park (13:00 GMT).

Team details and match preview as Munster host Ospreys in the European Champions Cup on Saturday.

New head coach Wayne Pivac is aiming to expand Wales' talent pool selecting more players based in England.