Robert Wallet was a tennis player competing for France.
Wallet finished runner-up to Max Decugis in the singles final of the Amateur French Championships in 1907, but took the mixed doubles title at the tournament the same year, alongside A. Péan.[1]
| Outcome | Year | Championship | Surface | Opponent in the final | Score in the final |
| Runner-up | 1907 | French Championships | Clay (Red) | Max Decugis | – |