“New year, same me,” wrote the American, as she seemed to reignite the pair’s bitter rivalry after the US’s victory over Poland at the United Cup.

Wrote the former world No. 53, "I am forever grateful to this sport I love."

Before Fritz sealed the victory, Coco Gauff beat Iga Swiatek for the second straight time.

The world No. 3 has now won her last three matches in a row against Top 2 players—and all in straight sets, too.

The WTA No. 3 and ATP No. 4 both won their singles matches to send the Americans into their second United Cup final.