US OpenHardSemi-finals21 Aug 2025 · 17:05
M. Chwalinska
#131 · Poland
VS
J. Tjen
#41 · Indonesia

Odds

Market
Chwalinska
Tjen
Winner

Player analysis

M. Chwalinska comes into this match in difficult form — 2 wins from the last 5. Form is mixed — DS ranging from -21.2 to 42.5, with at least one match where M. Chwalinska was clearly outplayed. The serve has been a concern — averaging only 5.7/10, leaving M. Chwalinska vulnerable on second serve and facing frequent return pressure. Good performance in key moments — break point efficiency of +19 over the last five.

DS 9.9Trend mixed

J. Tjen shows a 4–1 form record, though the level of opposition has been mixed — average ranking of opponents is 403. Point statistics tell a concerning story — average DS of -19.2, meaning J. Tjen has been on the wrong side of most exchanges over five matches. The serve has been a concern — averaging only 4.3/10, leaving J. Tjen vulnerable on second serve and facing frequent return pressure. Break point efficiency is a red flag — J. Tjen has been losing the important points, with a BP efficiency of -39 over recent matches.

DS -19.24Trend stable

Recent form

Hard court stats

Chwalinska
Stat
Tjen
59.3%
Win rate
81.5%
64–44
W–L
101–23

Avg stats — last 5

1st serve %70%
1st serve won60%
2nd serve won50%
BP converted70%
BP saved50%
Aces0
Double faults3
1st serve %60%
1st serve won50%
2nd serve won30%
BP converted20%
BP saved40%
Aces0
Double faults1

Head to head

Career meetings between these two players (all tournaments), not only this event. The match at the top of the page is the current tournament fixture.

01
Hard 01
M. Chwalinska vs J. Tjen head to head match history
DateTournamentSurfaceRoundWinnerScore
US OpenHardSemi-finalsTjen5-7 5-7