As Dasa posted, he averages only 23.66 in 4th innings. Agreed that he doesn't get many opportunities to prove himself and has batted only 12 times, still out of that he has been out on duck 3 times, other scores are 6,4, 21,30,40,28,17*,34*,33* not a single 50. So nothing much to brag about.
Even in ODIs when chasing a score his averages drops by 12 runs/innings. While batting 1st he scores a 50+ score every 3.5 innings, whereas this conversion rate more than doubles(7.2) while batting second.Once again it confirms my opinion that he is nothing special infact ordinary when chasing a target.