Former Australian tennis player Lleyton Hewitt believes there will be lots of things to watch out for at next year's Australian Open.
Six-time Australian Open champion Novak Djokovic and five-time runner-up Andy Murray could be handed a tough draw.
Djokovic has plummeted to No. 12 in the world, while Murray has fallen to No. 16.
2014 champion Stan Wawrinka has also fallen to No. 9 in the world.
The three tennis superstars haven't played since Wimbledon.
Milos Raonic and Kei Nishikori will also be coming off injuries as they were also forced to conclude the 2017 season earlier than expected.
"Coming in a lot of the top guys from the previous years are gonna be seeded a lot lower. Such as Djokovic, Murray...that kind of guys -- just because they haven't played really for the last six months. So, it's gonna be a massive question mark on how they come in, how their bodies are holding up. Mentally as well with a couple of them," Hewitt said.
Hewitt also believes defending and five-time Australian Open champion Roger Federer will be the main contender to win it all at Melbourne Park once again.
There are some question marks over Rafa Nadal's chances as he is dealing with a knee injury.
"But also, you know, Federer has been so dominant, especially in big tournaments. He's gonna go in -- even at the age of 36 -- as probably the favorite. Especially the way Nadal obviously had to pull out of London," Hewitt added.
Hewitt also added that rising stars such as Grigor Dimitrov, Alexander Zverev, David Goffin, and Dominic Thiem could have a chance to potentially make a splash at Melbourne Park this coming January.