World Champion's the Shoe competed against: Prost, Senna, Mansell, Hill, Villeneuve, Haikkonen, Raikkonen, Alonso. Whether they were previous world champions or not is pretty much a mute point. If the shoe hadn't won his 7 title we could potentially have 4 or 5 different world champions. They weren't world champion's while Schumacher was around, except Alonso, because he kept beating them.