Blogs & Opinion
Ulster withstood late Connacht pressure to run out 13-10 winners in the Guinness Pro12 on Boxing Day.
Ospreys went to the top of the Guinness PRO12 after a 31-20 bonus-point win over Ulster at the Liberty Stadium on Saturday.
Replacements Dan Lydiate and Sam Lewis are the only changes to the Ospreys team that lost to Racing Metro last week.
Scarlets avenged their loss to Ulster with a 22-13 win to end the Irish side's hopes of European Rugby Champions Cup progress.
Scarlets coach Wayne Pivac thinks his side are firmly in the mix for qualification from their Champions Cup pool.
Ulster will bid to keep their slender Champions Cup hopes alive when they face Pool Three rivals Scarlets on Sunday.