Cape Town - Victor Matfield and Fourie du Preez are the favourties to captain the Springboks if Jean de Villiers fails to recover in time for next year's Rugby World Cup.De Villiers suffered a horrific injury in South Africa's 12-6 defeat to Wales in Cardiff at the weekend. He dislocated his knee and is set to be sidelined for several months, leaving his participation at next year's World Cup in doubt.The 2015 Rugby World Cup only starts in September, but De Villiers's injury appears to be so serious that it could force him to miss the showpiece event.In that case, Matfield appears to be the favourite for captain, while Du Preez is also a candidate.The 37-year-old Matfield has made a stellar return to rugby this year and captained the Boks when De Villiers was injured at the start of the Test season. Du Preez has been sidelined with an ankle injury but should be back in action next year."Fourie could also be captain. I hope he's going to be fit for the World Cup, because we'll definitely need him if Jean is not going to be there," Meyer told Netwerk24.