Mark Williams is the Form Rating favourite at 57%, against 43% for Robbie Williams. They haven't met in the matches we hold, which start in June 2025. Mark Williams is 9–6 this season with 10 centuries. Robbie Williams is 6–4 this season with 1 century.
The percentages come from the Century Radar Form Rating, a margin-of-victory Elo over the last 12 months. We back-tested it on 408 matches of best-of-7 or longer played between 30 May 2026 and 4 October 2026, using only the ratings each player had before the match. The favourite won 60.8% of them, and 71.1% of the 90 where we held both players' full records. Best-of-7 matches are short, so upsets are common.