Serena Williams works out hard, fueling rumours of a comeback. (INSERT VIDEO)

Roger Federer and Serena Williams addressed their final goodbyes to tennis. Since they first arrived in this globe, before the 2000s, when each began their respective tennis Tours, the two previous world number ones have altered both men’s and women’s tennis.

Three years after the Queen of tennis joined, the King of tennis also became a professional tennis player in 1995. The American won twenty-three Slam trophies, a record that has not yet been matched.

Each Grand Slam stage has seen both of them win at least one title. Both were once world records. Tennis star Federer holds the record for the most consecutive weeks at the top with 186, while Serena has the same streak with 185, which she shares with Steffi Graf.

Two sports legends have become linked through their retirement as well. In New York, Serena Williams performed her final Last Dance before losing to Ajla Tomjlavonic in the third round of the US Open. It was a fantastic American-made celebration. Roger Federer, on the other side, opted for a legendary setting with the Laver Cup, London, and the Fab Four.

The American superstar was eliminated in the third round of the final Grand Slam of the year by one of Ajla Tomljanovic’s best performances, falling in three sets. In the three matches that highlighted Serena Williams‘ trip to Flushing Meadows, the public continually showed its support by packing Arthur Ashe Stadium’s stands.

The 23-time Grand Slam winner faced an Australian player who closed at 5-7 after throwing away a 5-3 advantage.

Serena Williams works out hard, fueling rumours of a comeback.

A video of Serena Williams working out hard on Instagram fuels rumours that she will make a comeback.

She worked on strengthening both her upper and lower bodies. Rumors of a potential return to tennis have been sparked by her recent social media posts about working out and staying fit. Watch Serena Williams‘ Instagram post below, which shows her workout: