Celtics are looking for a Danilo Gallinari replacement. Their HC Brad Stevens was sitting in the crowd during the Eurobasket match Croatia-Finland, and was seen typing down notes. Whether he was there to check Bojan (of Croatia) or Lauri (of Finland) or just enjoying the match I don't know, but I wouldn't be surprised to see Celtics cooking up a trade-offer for either of those (would prolly need a third partner too, as I can't see there would be anything Celtics can offer that would interest Jazz).
I think taking Stanley Johnson into their TPE would be cleaner.