Perkins took exception to Drake's comments as the teams were leaving the court at the end of the first half Tuesday (Wednesday NZ time).
The pair traded angry words again following Cleveland's 113-112 overtime win.
According to the NBA's Fan Code of Conduct, the league is "committed to creating a safe, comfortable, and enjoyable sports & entertainment experience". While no fight broke out, it seemed to warrant enough of a concern that the National Basketball Association has reportedly given Drake a warning on his choice of language during games.
Perkins told ESPN he was "here to support my teammates" when asked about the NBA's warning to Drake.
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'So I said something back to him, ' Perkins added.
Perkins was added to the Cavs playoffs roster but has not played. Based on just the first game, and the Drake vs. Perkins near-fight, this series will probably have plenty more drama on the way for fans.
"I'm here to represent the Cleveland Cavaliers", the 6-foot-10 center said.
The Raptors hosted game two on Thursday and Cleveland won 128-110.