Stefanos Tsitsipas advanced past Roger Federer via walkover in the Rome Masters quarter-final. Stefanos Tsitsipas moved ahead in the head-to-head, 2–1.
Tsitsipas S. advanced on a walkover.
Tsitsipas S. and Federer R. faced 17 of the same opponents in the last 12 months. Tsitsipas S. went 11–11 (50%) against them, Federer R. 18–9 (67%). Federer R. came out better against 7 of 14 comparable opponents, Tsitsipas S. against 4 — though 1 of those edges carries caveats (retirement).
Stefanos Tsitsipas advanced when Roger Federer withdrew. Umpiry, "Stefanos Tsitsipas vs Roger Federer — Rome Masters Quarter-final", https://umpiry.com/match/2019-05-13/federer-vs-tsitsipas-rome-masters-qf?utm_source=cite (as of 13 May 2019).