Even athletes have their own rituals. Football players often walk onto the pitch by stepping on the grass a certain way. For example, with their right foot first or touching the grass with their hand and crossing themselves. Novak Doković eats a bit of Wimbledon grass every time he wins the tournament. Those who watch ice hockey know that it's common for ice hockey players not to shave during the playoffs as it's believed to bring bad luck. You will often see a big contingent of bearded vikings on the ice.