Former Rangers winger Vladimir Weiss is desperate to tee up a Celtic revenge mission by overturning Kairat Almaty's lead in the second leg.
And the veteran has come to his dad's defence after his meltdown on the touchline during the 1-0 defeat in Kazakhstan.
Slovan Bratislava boss Weiss Sr was sent off in their first leg defeat after a late penalty was awarded against his side.
Despite playing the final 25 minutes with 10 men after Rahim Ibrahim was sent off, Slovan looked set to claim a valuable 0-0 draw in Kazakhstan until the last minute of the game, where Dastan Satpaev stepped up to bag the winner from 12 yards after Kairat were awarded a penalty kick.
The veteran boss confronted the ref and the fourth official and stormed onto the pitch before being dragged away a