Which Ben Simmons will show up when the Philadelphia 76ers and Toronto Raptors clash in their do-or-die game seven?

The 22-year-old Australian has alternated between Dr Jekyll and Mr Hyde personalities in the first six games of their NBA second-round playoff series.

Simmons was an unstoppable force in leading the 76ers to a game six 11-point win over the Raptors, but was a villain in the Raptors' 36-point thrashing of the 76ers in game five.

On Monday morning (AEST) the 76ers and Raptors, with the series locked 3-3, will face off in Toronto to decide who will play Giannis Antetokounmpo's top-seeded Milwaukee Bucks in the eastern conference finals.