point me to his impact winning matches for India?
You really don't go winning around with one good pacer and a bunch of barely Test standard ones. Hardly his fault, but still some of his biggest contributions:
1) He almost single-handedly won India the 1971 WI series.
2) The 4th Oval Test of 1979, that was a tragic draw.
3) 236* vs WI, 1983; drew that one.
4) The 1985 series draw in Australia, he scored mammoth runs and India would had won all 3 with a slightly better bowling attack.
5) Gavaskar, alongside Chetan Chauhan; set the foundation for the historic Melbourne win in 1981, by scoring some hefty runs in the 2nd innings.
6) Again in the 1976 tour, he won India the 3rd Test alongside Vishwanath; and set India in a winning position in the 2nd Test, which they drew with 2 WI wickets remaining and India only batting one innings, which they would had grabbed with a bit better pace bowling support, despite the spinners doing excellent. A. K. A, he almost drew that series.
7) The 1971 England tour, while he didn't contribute greatly overall and in the win, without his fighting 50 in the 2nd innings of the 1st Test at Lord's, India would had lost that match. Was also India's best batsman in the 2nd match, which ended in a draw.
8) In the 1975 drawn NZ tour, scored a century in the only win, and chased down the target while on crease.
9) 1977 tour of Australia, scored a match winning century in the 3rd Melbourne Test. India could had won that series, as they gave a fighting, if not winning, target of 342 in Perth, due to again a century from Gavaskar and Amarnath in the 2nd innings (Amarnath was the real hero though, scored a century in the 1st innings as well) ; and lost by 2 wickets.
10) In the two victories of the Australian home series, scored 76 in the first and 123 in the 2nd.
11) In 1978 WI home series, was the highest scorer.
12) The Georgetown century against the quartet in 1983, to confirm a draw.
13) The 96 vs Pakistan in 1987, Bengaluru. A series in which every other game was a draw, an innings from the only defeat may sound strange, but it's highly rated as his best ever; in a rank Turner where everyone else failed. And if I am talking about lost cause fights against Pakistan, 1983 Faisalabad loss, his sole fighting 4th innings century against peak Imran deserves a mention, as does his dual century in the 3rd Karachi Test of 1978.
