People are still searching for reasons to explain Steve Darcis' 7-6, 7-6, 6-4 first-round upset of No. 5 seeded Rafael Nadal this year.
Certainly, the knee injury that affected Nadal's movement and prevented him from playing a grass-court warm-up event was a factors.
However, if we look at the cold, hard facts, it's difficult to grasp how it happened.
First of all, Nadal's No. 5 seeding was misleading, the result of a computer ranking that penalized him for having missed seven months of action before his return last February.
His remarkable 2013 results heading into Wimbledon stated rather clearly that he was the best player in the world at the moment.
He had played nine 2013 events, got to the finals in all of them and won seven. Nadal's only loss since early February came against No. 1-ranked Novak Djokovic in April, and Nadal was riding a 22-match winning streak.
Nadal was coming off a victory in the French Open where he captured his 12th Grand Slam crown. Two of those major titles came in 2008 and 2010 at Wimbledon, where Nadal had been a finalist in five straight appearances (he did not play the event in 2009) before his second-round loss to Lukas Rosol in 2012 when he was injured.
Few had even heard of Darcis, and it's not surprising.
His only two match victories in 2013 came in a Davis Cup match against Nenad Zimonjic, who was unranked at the time and has since improved to 1,326th, and in France against 166th-ranked Adrian Mannarino. Darcis had not won a match in the main draw of a tour event since the first week of February, and he was ranked 135th heading into Wimbledon.
Darcis had won just one Wimbledon match in four previous tries, and last year he lost in the first round to Guillaume Rufin, who was ranked 168th.
The only evidence that Darcis might challenge Nadal was Darcis' victory over Tomas Berdych in the 2012 Olympics played at Wimbledon.
But no one expected Darcis to beat Nadal, certainly not in straight sets. The headline in the Daily Telegraph sports section the next day read, "Shock of the Century."
Not only did Darcis stun Nadal, but it turns out that Darcis did it with an injured shoulder. The Daily Telegraph reported that Darcis had to withdraw before his second-round match because of a shoulder problem he sustained against Nadal.