Christopher O'Connell def. Daniel Altmaier — Round of 32, Boss Open 2023

3–6

Hard

1–5

8–6

Clay

6–5

5–2

R32

2–5

4–1

R16

1–1

6–6

First match at an event

4–6

9–6

At ATP 250s

1–4

22

Completed matches

17

18%

Won in straight sets

29%

27%

Won after losing a set

12%

23%

Lost after winning a set

35%

32%

Lost in straight sets

24%

6–6

Tiebreaks

5–4

6–4

Deciding sets

2–5

8/10

Won after winning set 1

6/9

2/12

Won after losing set 1

1/8

0

Matches

2

0

Sets

8

15

Days since last match

10