It seems they have faced each other three times already.

Here's the summary:


Sadly, Kawhi's team prevails the LA but whatever, there should be a last match up between them somewhere in April if the league doesn't stop the operation. What a waste, Lakers might have a chance to tie it . Well, anyway, their matchup in playoffs would be way more interesting.

Source: https://www.landofbasketball.com/head_to_head_gl/lakers_vs_clippers_game_log_season.htm