The following heavily-revised provisional version of the 2014 World Superbike calendar has been announced.

New events at Sepang in Malaysia and Phakisa in South Africa - former home to the country's MotoGP round and famous for Valentino Rossi's 2004 debut Yamaha victory - are both present but 'Subject to Contract', as is Laguna Seca.

While Sepang could have been paired with Australia, as happens in MotoGP, scheduled MotoGP testing in late February and then the Malaysian F1 race on March 28-30 probably explains the decision to make Sepang's WSBK debut a standalone 'flyaway' in June - also well away from the October MotoGP date. The months of March and August will see no WSBK action.

Italy's Misano circuit is set to return - after a one-year absence - but Monza (Italy), Istanbul Park (Turkey), Silverstone (UK) and the Nurburgring (Germany) are missing.

The US round is the only event on the schedule which the World Supersport series will not attend. The planned 14th and final round - which would match this year's tally - is still to be confirmed, but intended to be 'overseas' (outside Europe).

The six-round STK championship is scheduled for all European rounds with the exception of Donington Park.

Kawasaki's Tom Sykes will defend his WSBK title in 2014, while WSS champion Sam Lowes is switching to Moto2...

Provisional 2014 World Superbike and Supersport Calendar:

Round 1: 23 February Australia Phillip Island GP Circuit Round 2: 13 April Spain MotorLand Arag?n Round 3: 27 April The Netherlands TT Assen Round 4: 11 May Italy Autodromo Internazionale Enzo e Dino Ferrari di Imola Round 5: 25 May UK Donington Park Round 6: 08 June Malaysia Sepang International Circuit (STC) Round 7: 22 June Italy Misano World Circuit Marco Simoncelli Round 8: 06 July Portugal Aut?dromo Internacional do Algarve Round 9: 13 July USA Mazda Raceway Laguna Seca (STC)* Round 10: 07 September Spain Circuito de Jerez Round 11: 21 September Russia Moscow Raceway Round 12: 05 October France Circuit de Magny-Cours Round 13: 19 October South Africa Phakisa Freeway (STC) Round 14: 02 November Overseas TBC

* WSBK class only.
STC = Subject to contract.
TBC = To be confirmed.