Considering how much Djokovic has now got to defend in 2012, it came as a bit of surprise to me when I checked his record on title defence and found he has so far only defended 3 out of his 28 titles and nothing bigger than an ATP500! In fact his record on title defence is the lowest among the top 4 players: Federer: out of his 70 titles, has defended 27 (9 Slams, 3 WTFs, 5 Masters, 4 500s and 6 250s) or approx. 38.6%. Nadal: out of his 46 titles, has defended 17 ( 4 Slams, 9 Masters, 4 500s) or approx. 37%. Murray: out of his 21 titles, has defended 5 ( 2 Masters, 3 250s) or approx. 23.8%. Djokovic: out of his 28 titles, has defended 3 (3 500s) or approx. 10.7 %. So this is a record he will have to start improving on this coming year if he wants to keep his no.1 ranking!