The Bucks compiled the best regular season record at 56-17 last season. Milwaukee, though, was taken out in the playoffs by the Heat. 
So the Bucks and superstar Giannis Antetokounmpo, armed with a contract extension, are anxious to begin a new season. They were a level higher than Boston last season and could be two levels higher right now given that the Celtics are without Gordon Hayward and Kemba Walker. 
Milwaukee has the stronger bench and firepower as the Celtics don't offer much once you get past Jayson Tatum and Jaylen Brown.