“It is amazing when you consider how clubs hire and fire these days.
“I think most days Villa would win the game, but Freiburg do not underestimate or think they’re a lesser team because they come from the Bundesliga,” he added.
The final between the sides from Germany and England will take place on Wednesday in Istanbul, Turkey, kicking off at 20:00 BST.
O’Hagan will not be commentating but he will be watching, and said his brother was a Villa fan.
“I’m sure it’ll be an amazing occasion.
“The fans from both teams will make it really a night to remember in Istanbul.
“If Freiburg win great for the Bundesliga, but if Aston Villa win I’ll be as happy for their fans as anybody.”