WATCH: Fritz puts on serving clinic for Philly Freedoms

The resumption of the ATP Tour will present a strange test for players of who can come out the gate in midseason form after a several-month pause in competition.

But one player who very much looks ready to return to action is Taylor Fritz, who put on a stunning serving display in World TeamTennis on Monday for the Philadelphia Freedoms.

First, up 2-1 in the opening set versus the Springfield Lasers' Mitchell Krueger, Fritz bombed a deuce-court ace down the T clocked at a rare 144 mph.

He wasn't done there, though. After setting up set point with an unreturned serve at 130 mph, Fritz ended the men's-singles session with another crack into the 140s:

Playing alongside Fabrice Martin, Fritz later pulled out the same play again to secure a 5-1 win in men's doubles with an ace, though that one merely went 127:

With a comeback women's-singles win from Sofia Kenin and a closing performance by the mixed-doubles team of Martin and Taylor Townsend, the Freedoms won the match with a total score of 23-17 to become 5-1 on the season.

Fritz, rated 15th on tour in percentage of first-serve points won, is currently at a career-high ATP ranking of No. 24.