(CNN) -- Spaniard Jorge Lorenzo will miss the final race of 2011 MotoGP season in Valencia this weekend as he continues to recover from a finger injury. The Yamaha rider required plastic surgery to repair a damaged ring finger on his left hand after a crash in Australia three weeks ago. Lorenzo, 24, is guaranteed second place in the world championship due to the 48-point lead he holds over third-place Honda rider Andrea Dovizioso. Australian Casey Stoner has already secured this year's world championship. Japanese test rider Katsuyuki Nakasuga will replace the 2010 world champion for Sunday's race in the Spanish port city.
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Jorge Lorenzo will miss the final race of the 2011 MotoGP season
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The Spaniard is still recovering from plastic surgery on his finger
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Sunday's race in Valencia is the first since the death of Marco Simoncelli
In addition, riders will gather on track prior to Sunday's season-ending race to their own tribute to @placeholder -- who raced for the Honda team.