United must score three goals in Saturday’s return-leg tie with Sewe Sport FC of Cote d’ Ivoire to qualify for the group stage.
Sewe had defeated the Nigerian side 2-0 in the first leg encounter played in Abidjan last week.
“My confidence is coming from my players and God; the players are working hard to achieve victory because we are determined to succeed.
“We have worked on the lapses noticed in our defence in Abidjan and definitely we will get it right on Saturday.
“We didn’t take our chances in the first leg encounter, but all of that have been corrected. I don’t see the match dragging into penalties.
“I am optimistic that we will get our three goals in the regulation time; we are already working on the strategy,’’ Bubara said.
He said the team lost in Abidjan because of momentary loss of concentration in the added time of the encounter.
Bubara pointed out that the state government had already motivated the players through Ebikitin Diongoli, the newly appointed Commissioner for Sports.
“The commissioner promised to reward the players and officials financially outside their usual match bonuses.
“I will not disclose the amount now, but the promise will serve as a motivation to the team,’’ he added.
Bubara said none of his players was injured ahead of the tie, but expressed regrets that the team captain, Salomon Junior, currently serving a match ban would be missed in the encounter.
The match will be played at 4 p.m. at the Sapele township stadium in Delta on Saturday.