The Court of Arbitration for Sport expects to issue rulings within a month on the doping appeals by tennis players Marin Cilic and Viktor Troicki.
CAS secretary general Matthieu Reeb tells The Associated Press that Cilic's appeal against a nine-month ban is scheduled to be heard in London next Wednesday.
Reeb says the International Tennis Federation challenged the verdict of its own independent tribunal. The ITF seeks a two-year ban for Cilic's positive test for a banned stimulant in May.
Reeb says the Croatian player requested a verdict before the Paris Masters starts Oct. 28.
Troicki appeared before a CAS panel in Lausanne on Wednesday to appeal his 18-month ban for skipping a blood test in April.
The verdict is expected before early November to allow the Serbian player to register for the Davis Cup final against the Czech Republic.