Mathew Leckie is preparing for what could be his final few games with Adelaide United ahead of a potential move to Germany.

The talented 20-year old is close to joining Bundesliga club Borussia Monchengladbach, subject to passing a medical once he arrives in Germany, meaning this finals campaign could be his last match(es) with the Reds.

Adelaide host Wellington Phoenix in tomorrow night's elimination final and Leckie says he is intent on doing what he can to keep the South Australian club's finals hopes alive.

"Going over there is something you have to organise behind the scenes but I am really concentrating on the finals and Adelaide," Leckie told the Adelaide Advertiser.

"We have to put in this year for the finals because it could be the last game we all play together.

"I am concentrating as hard as I can and it's a finals game, so it is extra special."

And Leckie said the efficiency in front of goals will be the key when the Phoenix come to Hindmarsh Stadium for the third versus sixth-placed match.

"Even though we lost against them two weeks ago I thought we had the chances in the first half to put them away. It is all about being clinical in front of goals," he added.

"I think we are doing quite well at the moment. I think the game against the Victory (2-1 win last week) has given us confidence and shown we can play good football again."