Trailing 2-0 from the first leg, boss Ruaidhrí Higgins believes his players can turn things around, but concede taking the lead is crucial.
Higgins wants his players to express themselves and he's hoping they can maintain their impressive record on the road.
"The players will go into the game with the pressure off them and that might suit us. They'll be playing on a really nice pitch, so we'll go there believing we can do something, which as I said no one else will believe we can do," he admitted.
"I want us to grab the game by the scruff of the neck, go out and express ourselves, play with freedom and see if we can produce something out of the ordinary."
1. Derry City training in Riga
Derry City players Jack Malone, Eoin Toal and James Akintunde, during tonight's training session at the Skonto Stadium. Picture by Kevin Moore/MCI Photo: Picture by Kevin Moore/MCI
2. Derry City training in Riga
Derry City striker James Akintunde chases the ball during tonight's training session at the Skonto Stadium. Picture by Kevin Moore/MCI Photo: Picture by Kevin Moore/MCI
3. Derry City training in Riga
Derry City players training ahead of tomorrow night's Europa Conference League second leg tie against Riga. Picture by Kevin Moore/MCI Photo: Picture by Kevin Moore/MCI
4. Derry City training in Riga
Derry City duo Danny Lafferty and Cameron McJannet leading the way during the training session at Skonto Stadium. Picture by Kevin Moore/MCI Photo: Picture by Kevin Moore/MCI