"I thought I played pretty well," Coll said after the match. "Youssef was incredible, just shows the mark of a great player, really well done for this week. I thought he might have been a bit tired, but he fronted up.
"This week has been a hugely emotional week for me. I was trying to celebrate and stay focused. I really wanted to win the tournament; it was a big ask for me. It's the biggest week of my career and of my life."
Coll now has some time off before his next event at the Canary Wharf Classic on March 13.
In the women's draw, fellow Kiwi Joelle King, ranked six, lost at the semifinal stage yesterday to in-form No 2-ranked Nour Goharn of Egypt in straight games.
After playing a number of long five-game matches leading up to her semifinal spot, she was well beaten by Goharn 11-5, 11-4, 11-3.
King's next tournament will be the Black Ball Open in Cairo starting March 12.