Actually Nieminem had nothing to do to break back. Just let Haas kills himself...
Nemo did a terrible game at 2-3 in the 5th when he was broken to love, then Haas did a terrible game being broken back to love as well.
At 5-6 Haas had a MP on Nieminem's serve and Jarkko did... a beautiful S&V to save it! After that at 40-40 Haas missed an easy FH volley while Nieminem was outside the court. It should have been a second MP.
At 6-6, Haas did two DFs in a row at 15-30 to give the break to Nieminem who conclude the match on two aces after having so much trouble on his second serve
(which is a true weakness considering his first serve is ok)
It was a big choke at the end from Haas but don't forget he play quite poorly today, missing a lot of FH especially. Nieminem could have won in 4 sets, he had a BP at 4-4 in the fourth and was very dangerous on every Haas's serve at this moment