Duelists who win the extended trade
Vi often wants to create short contact, then extend just long enough to finish the target with her passive, Conqueror, and bruiser items. Duelists like Olaf or Trundle turn that logic against her: they do not panic after first impact, accept melee range, and win when the fight lasts. If Vi spends Q and R to enter into a champion who actually wants to stay in contact, she loses her main advantage. Her engage no longer creates an execution; it creates a duel she did not necessarily choose.
How the champion adapts. Vi must avoid turning the game into isolated duels against this type of champion. She should play with her lanes, force objectives when her team can arrive first, and keep R for a less resistant or already damaged target. The right plan is creating numbers advantage, not proving she wins the 1v1.
Tanks or bruisers who absorb the impact
Vi loses a lot of value when her R does not force a real kill. Champions like Rammus, Wukong, or Jarvan IV can absorb her entry, crowd control her after impact, or create their own fight zone around her. The issue is not only that they survive: it is that they give their team time to answer. Vi then becomes advanced, visible, sometimes without Q available, and her team has to enter a zone already prepared by the enemy.
How the champion adapts. Vi must stop treating the frontline as a free target. If she hits a tank, it should be to force an objective, punish bad positioning, or apply armor shred with her team already ready. Otherwise, she should flank through vision and threaten the carry instead of hitting what the enemy wants to offer.
Junglers who break her early tempo
Vi often wants to reach level 5 cleanly to launch her first truly forced gank. Junglers able to contest her jungle, invade with priority, or take tempo before her ultimate create problems because they move the game before her main condition is active. Lee Sin, Rengar, Graves, or Shyvana can force her to defend camps, answer an objective take, or arrive late to river. A Vi who suffers through her first cycle loses the pressure that makes her level 5 threatening.
How the champion adapts. Vi must secure her first clear with a simple read: lanes with priority, camp to protect, and the side where her level 5 will have a real target. If the enemy wants to accelerate, she should not answer everywhere. She must accept trading one resource if it gives her a clean R on the most punishable lane.