Eight teams contested the 1975 tournament — the six Test-playing nations plus East Africa and Sri Lanka. The format was a single round-robin in two groups followed by knockout. West Indies, captained by Clive Lloyd, won their group ahead of Pakistan after the famous Murray-Roberts last-wicket stand at Edgbaston; Australia under Ian Chappell topped the other group. The semi-finals on 18 June produced wins for West Indies (over New Zealand at the Oval) and Australia (over England at Headingley).
The final at Lord's was played on the longest day of the year, with 60 eight-ball overs originally scheduled but reduced to 60 six-ball overs in the British convention. West Indies were 50/3 when Lloyd entered; he made 102 from 85 balls with 12 fours and two sixes. Rohan Kanhai's 55 was the quiet anchor at the other end. The total of 291/8 was, at the time, the largest in a one-day international.
Australia's reply was systematically derailed by Vivian Richards' fielding. Richards, then 23 and not yet the dominant batter he would become, ran out Alan Turner, Greg Chappell and Ian Chappell — three direct hits from cover and midwicket. Australia were 233/9 when Dennis Lillee and Jeff Thomson combined for a defiant 41-run last-wicket stand; Thomson was finally run out attempting a fourth run that the umpires (after a ball had been called dead in confusion at the boundary) awarded as the dismissing run.