During his career, he won more than fifty tournaments worldwide, including many of the most prestigious national opens of Europe.

Van Donck was one of the few golfers from continental Europe of the era who had been able to win regularly in professional tournaments in Britain.

Much of Van Donck's fame rested on his great putting ability, though his style was unorthodox as he kept the toe of his putter in the air, similar to Isao Aoki.

[1] In 1953 he won a total of seven tournaments on the European circuit, a record he still shares with Norman Von Nida who achieved the feat in 1947, and was awarded the Harry Vardon Trophy.

[2] In addition to his victories around Europe, Van Donck dominated in his home country, winning the Belgian national title sixteen times between 1935 and 1968 and the Professional Tournament of the Alliance on ten occasions.