First Test, Ahmedabad, day five (close):
India 426 & 412-4 drew with Sri Lanka 760-7 dec
Tendulkar has amassed more than 12,000 runs in his 160 Tests
Sachin Tendulkar hit his 43rd Test century as the first match between India and Sri Lanka in Ahmedabad petered out into a draw.
The hosts started the final day on 190-2, still 144 behind Sri Lanka, who racked up 760-7 in their first innings.
But opener Gautam Gambhir hit 114 as India knocked off the deficit, with Virender Sehwag also scoring 51.
Tendulkar, ably supported by VVS Laxman (51 not out), then moved to his ton before both captains agreed on a draw.
Tendulkar, who was celebrating his 20th anniversary as an international batsman, also became the first man to pass 30,000 international runs.
"It was a bit disappointing to draw the game," said Sri Lankan captain Kumar Sangakkara.
We expected the wicket to have a bit more bounce for the spinners, but it favoured the batsmen all the way
"It was a pretty flat track that did not have much for the bowlers. We were thinking positive on the final day and needed something to go our way but that did not happen.
"We did not gain any psychological edge, it's pretty even going into the next match but I am happy the way the team played as a unit.
"There are a lot of positives to take from the game, like our batting and the bowling of Welegedara, who was told just before the toss that he was playing after the injury to Thilan Thushara."
India captain Mahendra Singh Dhoni said he was delighted by the way his team fought back after conceding a huge lead.
"I am really proud of this achievement," he said. "We had to handle our nerves and that is what we showed. It was not easy to bowl on this wicket but our bowlers bowled their hearts out.
"I am not worried about our batting because we can handle any situation. We expected the wicket to have a bit more bounce for the spinners, but it favoured the batsmen all the way.
Gambhir, 74 at the start of the day, resumed India's battle for survival in the company of nightwatchman Amit Mishra (24).
Sri Lanka could have secured an early breakthrough had Tillakaratne Dilshan grasped a sharp chance offered by Mishra.
Dilshan, at second slip, grassed the edge and Mishra went on to frustrate the visitors for close to an hour until Dilshan made amends with a spectacular reflex catch at leg gully.
Tendulkar was off the mark immediately and drove Muttiah Muralitharan through extra cover for two boundaries in one over early in his innings.
He then dug in as India steadily erased the deficit, while Gambhir needed the better part of the first session to accumulate the 26 runs needed for his seventh Test century.
Gambhir, who added 66 for the fourth wicket with Tendulkar, then perished to a poor stroke six overs into the afternoon session, providing Sangakkara's side with a glimmer of hope.
India were still 59 behind at that stage, but Laxman joined Tendulkar and the two denied Sri Lanka further inroads with a solid display.
Tendulkar reached his half century with a clip to fine leg off Herath which yielded two and India soon wiped out the deficit and surged ahead.
Laxman, out for a duck in the first innings, provided fine support to Tendulkar and raised his half century - his 40th in Tests - in the final session.
India were 59 ahead at that stage and with only 16 overs remaining, a Tendulkar century was all there was to play for.
Tendulkar, stuck for a long time on 87, eventually moved on with a boundary off Angelo Mathews and closed in on the three-figure mark with another boundary off Chanaka Welegedara.
A scrambled single with the field well up helped the 'Little Master' reach his ton and play was called off immediately after, the fifth-wicket pair having added 137 in an unbroken stand.
The second Test of the three-match series starts on Tuesday in Kanpur.