He won the Bulgarian A Professional Football Group in 1963 and the Soviet Army Cup in 1958.

[2] Todor made his international debut on 13 November 1955, when he scored a goal against Czechoslovakia in a 3–0 win in Sofia.

He was capped 55 times for Bulgaria national team and scored 16 goals.

Diev played for the team in 1962 FIFA World Cup in Chile[3] and won a bronze medal in the 1956 Summer Olympics in Melbourne.

After the match, he received an offer for transfer to a Brazilian club, but he refused.