Tenacity reduces the time of crowd control effects(such as a suppress)
So if we take Warwick's ult :
ACTIVE: Warwick blinks to target enemy champion, suppressing the target for 1.8 seconds and damaging the target 5 times in 1/3-second intervals. Warwick gains 30% life steal for the duration. Each of his strikes triggers on-hit effects and benefits from life steal and full stacks of Eternal Thirst.
And he uses his ult on a champion with 35% tenacity making the suppress last for 1.17.
This is not enough time to do 5 attack with a 1/3 second interval.
Does this mean that he will only do 3 attacks? or will he still do damage after the target has broken free?