Tendulkar, 38, achieved the feat when he reached 28 on the third day of the first Test against the West Indies at the Feroz Shah Kotla ground in New Delhi.
Tendulkar was unbeaten on 33 and Rahul Dravid was on 30 as India - set a victory target of 276 - reached 152-2 by stumps.
The Mumbai batsman, playing his 182nd Test match, already holds the world record for most runs and centuries in both Test and one-day cricket.
Tendulkar needs one more three-figure knock to become the first batsman to score 100 international hundreds. He has 51 Test and 48 one-day centuries so far.
Dravid is second in the Test scorers' list with 12,859 runs, ahead of Ricky Ponting of Australia (12,487) and West Indian Brian Lara (11,953).
Top run-getters in Test cricket (minimum 10,000 runs)
15,005* - Sachin Tendulkar (IND)
12,859* - Rahul Dravid (IND)
12,487 - Ricky Ponting (AUS)
11,953 - Brian Lara (WIS)
11,947 - Jacques Kallis (RSA)
11,174 - Allan Border (AUS)
10,927 - Steve Waugh (AUS)
10,122 - Sunil Gavaskar (IND)
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