Per TNT’s David Aldridge:
Hearing Mirza Teletovic, almost back from blood clots, won't play today in Game 1 of the Nets series against Atlanta (5:30 pm, @NBAonTNT).
— David Aldridge (@daldridgetnt) April 19, 2015
Teletovic hasn’t played since January 22nd and was expected to be out until next season, so if they get him at any point during the series, it’s a miracle comeback.