|Grigor Dimitrov of Bulgaria, ex-boyfriend of Maria Sharapova, in action at the 2016 China Open|
"I think tennis misses her," the Bulgarian world number 20 said of the five-time Grand Slam champion, adding that he had "zero doubts" she would make a successful return.
"As a competitor she's just going to come back and she's going to be so hungry to play and excited and motivated," said Dimitrov, who dated the Russian superstar for two years until they split in July 2015.
But he added: "If you do something, I mean obviously there are circumstances. And whoever does something deserves what he gets for sure."
Dimitrov was responding to a question about an interview in which Sharapova accused the International Tennis Federation (ITF) of trying to make an example of her by giving her a 24-month ban for testing positive for meldonium.
The suspension was cut to 15 months on Tuesday after an appeal to the Court of Arbitration for Sport (CAS), meaning Sharapova can return to action next April.
Dimitrov cited the case of world number 1,857 Joshua Chetty, who was banned from tennis for life in September for match-fixing offences.
"It's never up to me or ITF and all that," Dimitrov said, referring to punishments of players.
"I think throughout the years, these kind of things should have started earlier with examples and all of that."
Dimitrov is currently in Beijing for the China Open, where he booked his place in the second round by beating American Steve Johnson 7-5, 6-7 (7/9) 6-4.
Sharapova has admitted to taking meldonium for 10 years for health reasons, but said she wasn't aware it had been added to the World Anti-Doping Agency's list of banned substances in January.
The CAS judgment said Sharapova, one of the most marketable female athletes in any sport, was not an "intentional doper" but that she also "bore some degree of fault".