Charles Grethen
Charles Grethen is a Luxembourgish middle-distance runner competing primarily in the 800 and 1500 metres. He represented his country at three consecutive European Championships.
Personal bests
Outdoor- 800 metres – 1:46.44
- 1000 metres – 2:18.95
- 1500 metres – 3:32.86 NR
- One mile- 3:53.20 NR
- 800 metres – 1:48.26
- 1500 metres – 3:45.05