2. Somebody other than the Big 3 will win a Slam
The Big 3 - Federer, Nadal and Djokovic - have dominated the sport for the past decade and a half. Since the 2005 French Open, only 8 out of 59 Slams have seen someone other than the Big 3 winning the ultimate prize in tennis.
The last one to do so was Stan Wawrinka, back in 2016 when he won the US Open. Wawrinka, along with Marin Cilic, Andy Murray and Juan Martin del Potro, are the only active members outside the Big 3 to have won a Slam.
The NextGen have never been stronger than they are now, and perhaps 2020 could finally be the year we have a first-time Slam winner. Some major possibilities could be Dominic Thiem finally winning Roland Garros, or either of Stefanos Tsitsipas and Daniil Medvedev winning on the hardcourts of Melbourne or New York.
It will be interesting to see if anyone can end the dominance of the Big 3 at the Slams in 2020. My bet is that someone will.
What is the foot injury that has troubled Rafael Nadal over the years? Check here