There are many problems to play Sachin in T20 World cup because BCCI send their probable 30 players list to ICC and they should be select team from these 30 only. Also Sachin is not insisting to play T20 world cup. Ofcourse he can play well if he play the world cup.
Don't go for his age, Watchwhen he plays. He looks young and will leave behind the youngsters in the world cup