I couldn't find anything for this season, but Nikola Jokic assisted on 16 baskets versus the Celtics in 2020-21.

jokic assists vs celtics this season
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NAMESEASONTMGPASTMPGPPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBSTLBLKTOVPF+/-
Nikola JokicNikola Jokic2020-21DENDEN21634.530.08.08.01.51.02.511.019.057.91.53.542.96.57.586.76960163256+11
StatMuse has game-level data for assists going back to the 1982-83 season.