Thomas, who won last month's Volta ao Algarve, will hope to challenge once again in the General Classification, while Porte continues his build up to the Giro d'Italia.
Froome, meanwhile, will be joined by British champion Peter Kennaugh, Mikel Nieve and new signings Leopold König and Wout Poels at Tirreno. Elia Viviani will be their man for the sprints, while Omloop Het Nieuwsblad winner Ian Stannard and Salvatore Puccio round out the squad.
Stannard and Viviani will also be in action on Saturday at Strade Bianche, and Sebastian Henao will lead Sky in their first appearance at Le Tour de Langkawi.
Strade Bianche [7 March]
Andy Fenn, Peter Kennaugh, Christian Knees , Salvatore Puccio, Ian Stannard, Elia Viviani and Xabier Zandio.
Le Tour de Langkawi [ 8-15 March]
Ian Boswell, Philip Deignan, Nathan Earle, Sebastian Henao, Danny Pate and CJ Sutton.
Paris-Nice [8-15 March]
Bernhard Eisel, Lars-Petter Nordhaug, Richie Porte, Nicolas Roche, Luke Rowe, Ben Swift, Geraint Thomas and Sir Bradley Wiggins.
Tirreno Adriatico [11-17 March]
Chris Froome, Peter Kennaugh, Leopold König, Mikel Nieve, Wout Poels, Salvatore Puccio, Ian Stannard and Elia Viviani.
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