A cagey first half saw both teams go in at half time goalless.
After both teams came out in the second half the Filipino players began to dominate the game and opened the scoring in the 58th minute.
Despite conceding a goal, Hanoi FC immediately hit back with an equaliser coming from forward Omar.
The match concluded with both teams tied at 1-1.
Hanoi FC will play Ceres Negros in the tie’s second leg at the Hang Day stadium next week.
Thanks to scoring an away goal, the Vietnamese team only need a goalless draw in the home fixture to advance to the next round.