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|Date of birth||21 September 1931|
|Place of birth||Belgrade, Kingdom of Yugoslavia|
|1954–1961||Red Star Belgrade||92||(48)|
|1964–1966||Red Star Belgrade|
|1974–1975||San Jose Earthquakes|
|* Senior club appearances and goals counted for the domestic league only|
At the 1984 Summer Olympics, he guided Yugoslavia to a bronze medal.
In 1951, he signed with NK Olimpija Ljubljana, where he spent playing the next three years.
In 1954, Toplak left Olimpija for Red Star Belgrade. He played at Red Star for seven years, until 1961. With Red Star he won the Yugoslav First League in the seasons 1955–56, 1956–57, 1958–59, 1959–60. He had also won the Yugoslav Cup in the 1957–58 season and the 1958–59 season. On international club level, he won the Mitropa Cup in 1958.
He left Red Star in 1961 and shortly after retired from football at the age of 30.
Toplak earned 1 cap for the Yugoslav national team in 1956, but did not score a goal in that game.
After the A team, he managed the Yugoslavia U20 and Yugoslavia U21 sides, both at the same time from 1978 to 1980. He led the U21 side at the 1980 UEFA Euro U21 Championship where he got the team to the semi-finals.
From 1991 to 1993, Toplak managed the Indonesia national team. In 1993, after leavin Indonesia, he announced his managerial retirement.
Red Star Belgrade
- Yugoslav First League: 1955–56, 1956–57, 1958–59, 1959–60
- Yugoslav Cup: 1957–58, 1958–59
- Mitropa Cup: 1958