Complex sentence: In February the WCT sued Björn Borg, as well as his management company IMG claiming that Borg had committed a breach of contract by electing to participate in the competing 1977 Grand Prix circuit instead of the WCT circuit.
Split into simpler sentences: In February the WCT sued Björn Borg, as well as his management company IMG. WCT stated that Borg had committed a breach of contract by electing to participate in the competing 1977 Grand Prix circuit instead of the WCT circuit.