Fibak is best known for his doubles success with Dutch pro Tom Okker and Australian Kim Warwick, although he also reached the Top 10 in singles.

He was consistently ranked in the top 20 in singles, and earned $2,725,403 in career prize money.

The highlight of his career was winning the Australian Open men's doubles in 1978 with Kim Warwick.

After the fall of communism in the early 1990s his company Fibak Press acquired the regional former PZPR mouthpiece Gazeta Poznańska, until it was acquired by rivals Głos Wielkopolski in 2006, and published several other newspapers and magazines as well as being involved in books related to tennis.

[3] Fibak divides his time between Warsaw and Monaco, where he was Poland's honorary consul.