On the back of nails causing 30 punctures in the 14th stage of the Tour de France overnight, we look at other instances where acts of sabotage have influenced a sporting contest.
Priest
Former Irish priest Cornelius Horan ruined the hopes of Olympic gold for marathon runner Vanderlei Lima at the 2004 Athens Olympics when he ran onto the course and tackled Lima to the ground. Lima was leading the race at the time with less than seven kilometres to go.
The Brazilian recovered only to finish with the bronze as Italian Stefano Baldini run past him for the victory. Lima later received the Pierre de Coubertin medal for sportsmanship.
It was the second time that Horan intruded on a sporting event after running on the track during the 2003 British Grand Prix waving banners saying "Read the bible" and "The Bible is always right".
Oil
The fourth test of the 1975 Ashes series was evenly poised heading into the final day with Australia needing 225 runs for victory with seven wickets in hand. A win would secure a series victory for the Aussies. However protestors for wrongfully convicted robber George Davis vandalised the pitch during the night by digging holes and pouring oil on it and the match was abandoned.