Ospreys to face Scarlets in Challenge Cup last 16

Ospreys beat Scarlets 23-22 in the festive derby last month

Ospreys will host Scarlets in an all-Welsh last 16 tie of the European Challenge Cup.

Perpignan's bonus-point win over Zebre on Sunday ended Scarlets' hopes of a home tie.

The fixture is due to be played on the weekend commencing 4 April.

Swansea City are scheduled to face Derby County in football's Championship at the Swansea.Com Stadium on the Saturday.

Ospreys could host Scarlets there on Sunday or at a different location on Saturday, potentially Bridgend's Brewery Field.

Bridgend are due to play their Super Rygbi Cymru home game against Cardiff on 5 April, but that fixture could be pushed forward 48 hours.

The Ospreys and Scarlets tie comes just a week after Scarlets host Ospreys in the United Rugby Championship (URC) on 29 March.

Cardiff will also be on the road in the Challenge Cup knockouts.

They have been drawn against Connacht who they lost to in their final pool game on Friday.

Dragons failed to progress after finishing fifth in their pool.