Cardiff Blues ran riot to score five tries in a 35-17 demolition of the Ospreys at the Principality Stadium.
The Ospreys say all concussion protocols were followed after Dan Biggar commented he felt "dazed" during their game against Leinster.
Players from both hemispheres enjoyed the sunshine with a feast of running rugby - who made our team of the week?
Ross Byrne scored a last-minute drop goal to give Leinster a vital 20-18 win over the Ospreys in the Guinness PRO12.
Stade Francais secured a Challenge Cup semi-final against Bath after beating Ospreys 25-21 in Cardiff on Sunday.
Player Mic will be back in action when Ospreys host Leinster in the Guinness PRO12 on Saturday, live on Sky Sports 1.
The Ospreys lost ground on the top two in the Guinness PRO12 with a surprise 13-5 defeat to Treviso in Italy.
Wales and Ospreys captain Alun Wyn Jones will be out until at least the end of April with a shoulder injury.
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