Enyimba International of Aba took a big step towards the CAF Champions League group phase when they defeated Etoile du Sahel 3-0 in the first leg of their second round tie in Port Harcourt on Sunday.
Udoh struck first for the Nigerian champions in the ninth minute as they went into the break 1-0 up.
The former Akwa United star then made it 2-0 for Enyimba in the 56th minute.
Etoile’s task became harder in the 71st minute as they were reduced to ten men after Ghazi Abderazek earned a second yellow card for dissent and was sent off.
Udoh completed his hat-trick in the 80th minute to give Enyimba a healthy advantage ahead of the return leg in Sousse, Tunisia.