The odds were against the challenger in the fourth tiebreak game, as he needed a win with Black to force blitz games against the champion. A tall order, but Boris Gelfand managed to achieve a playable and superior position out of the opening. As usual, Viswanathan Anand defended very actively, and when Gelfand failed to swap a pair of rooks (e.g. with 21...Bd8) White took advantage. Anand's counterplay was enough to compensate for Black's extra space and bishop pair - indeed, the latter wasn't a factor and the former threatened to become a liability. Gelfand's usual time trouble didn't help, and Anand drew from a position of strength and kept his title. (For subscribers, my analysis and videos of the games will be sent out later today.)
What a heartbreaker for Gelfand, but Anand earned the match victory, holding on and making the most of almost every opportunity he was given. Congratulations to both players, especially the winner and still champion, Viswanathan Anand!