BENGALURU - The WTA has begun a review of its rules that could see players cleared of doping offences or have their bans reduced return to the circuit with "special rankings" in future, the governing body of women's tennis told Reuters on Wednesday.

The rule change is being considered following the high-profile case of Simona Halep, who made her comeback at the Miami Open with a wildcard on Tuesday after the Romanian's four-year doping ban was cut to nine months by sport's highest court.