Friday's Pro14 fixtures saw a trio of easy victories as the Cheetahs, Leinster and Connacht all won by big margins.
Ulster suffered a hammering in Bloemfontein, where wing Anthony Volmink scored three of nine tries for the Cheetahs.
Dave Kearney's hat-trick helped Leinster begin the defence of their Pro14 title with a win over Benetton Treviso.
Munster, Racing 92 and the Ospreys will take on holders Saracens in the pool stage of the 2019-20 European Champions Cup.
Stephen Larkham has agreed to a new challenge with Irish province Munster, signing a deal until June 2022.
Munster gave it a great go, but Leinster have the chance to be crowned Pro14 champions once again.
A pitch invader who confronted Saracens' Billy Vunipola has been banned from all home fixtures by Munster.
After Billy Vunipola was confronted by a fan in a Munster shirt on Saturday, the Irish province distanced themselves from the supporter.
After the controversy surrounding his support for Israel Folau, Billy Vunipola declared himself "grateful" to be playing for Saracens.
Michael Rhodes and Billy Vunipola scored tries but Owen Farrell's 22 points from the tee were key for Saracens against Munster.