There will be an all-Irish final in Pro14 after Ulster came from behind to defeat Edinburgh and book a date with Leinster.
Danny Wilson got his maiden Pro14 win as Glasgow Warriors' new coach on Friday, though the 15-3 victory over Edinburgh was unspectacular.
Leinster picked up where they left off in the Pro14 as they held off Munster in a thrilling contest in Dublin on Saturday.
John Barclay has confirmed his 16-year professional career has come to an end after leaving Pro14 side Edinburgh.
A five-week break has been implemented in the Premiership, with the Champions Cup and Challenge Cup quarter-finals pushed back.
Ryan Baird and Dave Kearney both scored hat-tricks as Conference A leaders Leinster routed Glasgow Warriors on Friday.
Leinster became the first Pro14 side to win their first 12 league matches of a season after they overcame Ospreys on Friday.
The Ospreys claimed only their second Pro14 win over the season at the expense of high-flying Ulster in a stormy Swansea.
George Turner's late try ensured Glasgow Warriors claimed the bragging rights in their 1872 Cup clash with Edinburgh in the Pro14.
John Barclay, a veteran of 76 caps, will continue his rugby career but has opted to step away from Scotland duty.
Eroni Sau's try proved decisive as Edinburgh saw off Pro14 Group B leaders Munster, while Ulster thrashed Scarlets on Friday.
Andrew Porter and Ronan Kelleher each crossed twice as Leinster maintained their 100 per cent record, while Edinburgh beat Dragons.
After succumbing to a thrashing against Edinburgh in their previous match, Scarlets narrowly beat Cheetahs in Pro14.
The standout team in Pro14 could only manage a 3-0 win against winless Zebre as Leinster struggled on Saturday.
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.