Retour
The Egyptian winger has been in and out of the Hoops' starting XI in recent weeks and performed well despite still only producing two assists from his 17 total appearances.
Hassan, 24, has had to bide his time for a proper lengthy run in the team but he was not involved at all as Celtic narrowly pipped Killie in a 1-0 victory at Parkhead.
His omission from the team sheet before kick-off had fans curious as to whether or not the playmaker had perhaps sustained an injury at Lennoxtown in the build-up.
However manager O'Neill instead revealed it was "manoeuvring" that has kept the attacker out of the squad with Camilo Duran picked on the flank instead and Kasper Hogh through the middle.
Yang and James Forrest were the two wide men who were on the bench for the Hoops and O'Neill made his thoughts public.
"How is (Hassan)? We're trying to do, as much as possible, we're trying to do a bit of manoeuvring at this minute. I just think it'll be great for places.
"If there's proper competition for places, it can only make us better."