The 37-year-old eased past Argentina's Leonardo Mayer and will face either close friend Stan Wawrinka or Greek sixth seed Stefanos Tsitsipas for a semi-final spot.
Federer eases into 12th French Open quarter-final
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The 37-year-old eased past Argentina's Leonardo Mayer and will face either close friend Stan Wawrinka or Greek sixth seed Stefanos Tsitsipas for a semi-final spot.
