Paire, a 23-year-old Frenchman, outlasted top-seeded Spaniard Pablo Andujar, 6-3, 1-6, 6-3, firing seven aces while saving five of eight break points in the match.
The world No. 96 will be facing Seppi, who made the final with a 2-6, 6-2, 7-5 triumph over Argentine David Nalbandian, who committed seven double faults en route to the loss.
It will be the first final of 2012 for the Italian.
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