A renowned sports lawyer claims the World Anti-Doping Agency (WADA) will be successful in its appeal, resulting in a ban from tennis for Jannik Sinner.
Carlos Alcaraz at the top of his game, is stronger than Jannik Sinner's best, according to tennis coach Patrick Mouratoglou.
An emotional Jannik Sinner won his first ATP Finals title in front of his adoring fans in Turin on Sunday.
Jannik Sinner is now assured of remaining in top spot until after next year's Australian Open.
Daniil Medvedev gave Jannik Sinner a glowing tribute after he was comprehensively beaten in their ATP Finals clash on Thursday.
Jannik Sinner's form showed no sign of waning after he turned on the style in front of his home fans to trounce Taylor Fritz 6-4, 6-4 at the ATP Finals on Tuesday.