Even though the IAAF's vedict has yet to be delivered, Semenya announced in March she was returning to action.
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Earlier in December, Cech insisted he had no fears about returning to action.
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The Rugby Football Union say he has started his rehabilitation programme with a view to returning to action in five to six weeks.
He was sidelined for six months with a knee injury but he has struggled to regain top form since returning to action in February 2006.
Ferdinand, 31, is currently serving a four-match ban for violent conduct after only just returning to action following a three-month lay-off because of a back injury.
The Swiss Football Association said the 24-year-old's problem was not as bad as first feared and that he was confident of returning to action this month.
Since returning to action last month, Nadal has played three events, all on clay, and won two of them (he lost the third in the final).
Their main highlight of the opening half was Emanuel Pogatetz returning to action after his lengthy lay-off, coming on for Andrew Taylor in the 30th minute.
Staal is returning to action at a critical time for the Rangers, who entered Game 3 against the Washington Capitals down 2-0 in the best-of-seven, first-round series.
Terry's expected period on the sidelines would mean he would only just be returning to action a week before the encounter with Switzerland - England's first match under Capello.
Welsh rugby fans were treated to the welcome sight of Lee Byrne returning to action for the first time since suffering ligament damage to his right foot in October.
Last week, the Swiss Football Association told BBC Sport that Djourou's injury was not as bad as first feared and that the player was confident of returning to action this month.
But it is fair to say that the other leagues all lost something tangible during their work stoppages and each has struggled to recover popularity, relevance and footing after returning to action.
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German Kaymer can return to the top of the Race to Dubai standings by winning his first event since returning to action after a go-karting accident while Garcia is the defending champion.
Staff Sergeant Romesha moved uncovered under intense enemy fire to conduct a reconnaissance of the battlefield and seek reinforcements from the barracks before returning to action with the support of an assistant gunner.
The Blues were also boosted by the sight of inspirational number eight Xavier Rush returning to action after injury in the second half, as the New Zealander came off the bench for Molitika.
Gatland cited the precedents of Ireland hooker Jerry Flannery recently returning to Test action after injury and Scotland having Mike Blair on the bench against Wales following a lengthy lay-off.
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There was concern for Hibs when Ian Murray was withdrawn for treatment after suffering a facial injury and he was off the park for eight minutes before finally returning to the action.
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The Belgian, bidding for back to back grand slams at the Australian Open later this month, won the first eight games against Molik, who is returning to major tournament action after being sidelined since the 2008 Beijing Olympics.
Flintoff is renowned for his pace and accuracy and has shown fine form with the ball since returning to first-class action with Lancashire.
Disneyland's management attempted to play down the strike action, claiming that the actors were gradually returning to work.
Further baton rounds and two more live rounds were discharged by officers, resulting in Allwright returning fire in what was believed to have been an accidental "reflex" action.
But BioWare is also returning to its RPG roots with this game, so there will be a nice blend of action and role-playing.
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