Pakistan outplayed India in all three departments of the game.
They were eventually dismissed for 158 in reply to Pakistan's 338 for four, which featured Fakhar Zaman's 114, the left-handed opener's maiden one-day global hundred coming in just his fourth match at this level.
Sarfraz paid tribute to the influence of a coaching staff led by Mickey Arthur, who took charge shortly before Pakistan's tour of England past year, where a Test series was shared but the ODI campaign lost 4-1.More news: Newt Gingrich: Trump has a 'compulsion to counterattack'
Pakistan enhanced their long-held reputation as one of the most unpredictable teams in world sport with an extraordinary and overwhelming victory over bitter local rivals India in the Champions Trophy final on Sunday.
But the Pakistanis wrote off that defeat as an aberration.More news: Portugal captain Cristiano Ronaldo not concerned by Confederations Cup draw with Mexico
Earlier, Fakhar made the most of an early reprieve after Kohli won the toss and sent Pakistan in on a typically good Oval pitch, with the sunny conditions seemingly ideal for batting.
Pakistan have lost all three of their previous matches against India in the knockout stages of International Cricket Council events but Sarfraz said: "I am proud of my boys: we were ranked number eight and today, we have nothing to lose". But luck was on Pakistan's side.
Zaman top scored with 114 while his fellow opener Azhar reached 59.
The 128-run opening partnership between Fakhar and Azhar Ali helped bolster green shirts' overall total.
Disappointed with the coin not turning in his favour, Pakistan skipper Sarfraz said, "We wanted to bowl first".More news: Twelve Top US Universities Reaffirm Commitment to Climate Change Pact
Babar Azam was next and Pakistan got to 200-2 after 33 overs and were on for around 400 with the "rule" these days being doubling the scorer at 32 overs.
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