Dončić scored 32 and Irving 23, but it was the grind-it-out mind-set that was the difference Tuesday night.
With Giannis Antetokounmpo out, Siakam thrived against Milwaukee.
Luka Doncic scores 32 points to help the Dallas Mavericks to a 96-93 win to level their play-off series against the Los Angeles Clippers at 1-1.
Phoenix focused their defense on stopping Anthony Edwards and other Timberwolves stepped up.