The biggest tennis title of Leylah Fernandez's career arrived at the D.C. Open on Sunday with the help of a terrific backhand, some superb returning — and energy courtesy of Shake Shack's burgers and fries.

Leylah Fernandez needed just 1 hour and 9 minutes to cruise past Anna Kalinskaya and win the Mubadala Citi DC Open title -- her first WTA 500 trophy.

Left-hander Leylah Fernandez knocked out the world No. 4, 6-3, 1-6, 6-4, to reach the quarterfinals in Washington, D.C. on Thursday evening. The Canadian wiped away an early break in the decider, before beating Pegula to the finish line when her opponent’s forehand clipped the tape and sailed wide on the first match point of the day.

Left-hander Leylah Fernandez rallied to defeat third seed Elena Rybakina of Kazakhstan, 6-7 (2), 7-6 (3), 7-6 (3), and book a spot in DC Open final on Saturday (Sunday in Manila).

From surviving three-hour duels to beating top seeds Jessica Pegula and Elena Rybakina, Leylah Fernandez’s DC run revealed a fighter ready for the hard-court summer.

Raducanu has already secured British No 1 status with her progress in Washington DC and now faces a final four test against Kalinskaya with Leylah Fernandez facing Elena Rybakina in the other Citi Ope