Nonetheless, they went down in the second minute after Michael Frey put the hosts ahead courtesy of an assist from Sivert Heltne Nilsen.
Their lead was threatened in the 27th minute after Aleksandar Vukotic was sent off for a second caution. The Serbian defender was punished for elbowing Belgian midfielder, Christian Bruels.
Capitalising on Waasland-Beveren’s disadvantage, the hosts dominated ball possession and, ultimately, they leveled matters in the 32nd minute through Yuma Suzuki with Bruels providing the assist.
Truiden went into the half-time break with a slim advantage as Hayen’s side got punished for their numerous misses.
Beveren pushed harder for the equaliser, sadly, they were not able to match their opponents who were well organised.
Mboyo at the double as St Truiden subdue nine-man Waasland-Beveren goal.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from goal.com Daily Mail and Mail on Sunday newspapers.