(CBS) – It’s an emotional time for Northwestern University fans — but also for parents.

Case in point: former NBA coach Doug Collins, whose intense expression drew attention in the final moments of Thursday’s cliffhanger first-round game in which Northwestern prevailed 68-66 against Vanderbilt.

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Collins — a former Chicago Bulls coach and father of Northwestern coach Chris Collins — declined to talk about his roller-coaster experience watching as a fan.

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“This is CC time,” Doug Collins texted to CBS 2’s Vince Gerasole, referring to son Chris. “I love being his dad. Go Cats.”

The message was followed by three prayer emojis.

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Possibly the most famous Northwestern alum watching this week was actress Julia Louis-Dreyfus, whose son, Charlie, is a sophomore forward. She has been tweeting her support.