Welsh rugby union side Cardiff Blues travel to Stade Francais this weekend for their European Champions Cup semi-final play-off and a victory will see them face either Northampton or Gloucester in the final on May 26th.
Warburton, who is on the mend after sustaining a knee injury in April, will captain his second Lions squad and Gatland said that the Welshman must focus on his fitness.
"It would be ideal for us if he didn't play for the Blues," Gatland told British media.
