Shortly after Roger Federer announced the end of his 2016 season, I suggested that the Big Four Era on the ATP Tour was over. That era was one known for the dominance of Novak Djokovic, Rafael Nadal, Federer, and Andy Murray. Djokovic and Murray are alive in the 2016 ATP World Tour Finals as they enter the semifinals this weekend with the top ranking on the line. However, Nadal and Federer are nowhere near the top any longer as the Spaniard and the Swiss finish the season with relatively low rankings.

Rafael Nadal is the World No. 9

Nadal will finish the 2016 ranked 9th in the world, sandwiched between Dominic Thiem and Tomas Berdych.

He was only a shadow of himself in 2016 with injuries a big reason why. The 2016 French Open was particularly disappointing for the Spaniard as he entered Roland Garros with some momentum following titles in Barcelona and Monte Carlo. However, he was unable to contest this third-round match at the French Open, leading to his earliest exit at the event in his career.

Roger Federer the World No. 16

When Roger Federer announced his decision to end his season I wrote the following: "Without a miraculous return, it’s hard to picture a scenario where Federer stays in (the) upper echelon of the men’s rankings. He will lose 3800 ranking points between now and the start of 2017...Basically, it all means that he should be ranked about 16th when the 2017 season gets underway in January" (July 27th/MovieTVTechGeeks).

The World No. 16 position is in fact where he will finish the season thanks to his knee injury. At the age of 35, it's hard to know what to expect of Federer next season. However, many are optimistic that he will, in fact, return to the Top 10.

With a couple of familiar faces falling in the rankings, there are some unfamiliar faces with precedent-setting rankings in 2016.

Milos Raonic of Canada, a player still alive in the London draw this weekend, will finish the tennis season ranked 3rd in the world. Marin Cilic is also at a new career high as the Croatian will finish the season ranked 6th following a disappointing result in London.

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