"I want to make progress in the national team and that's only possible when I also play at the club," Wood said.
Bayer Leverkusen striker Stefan Kiessling was left "lost for words" following the club's DFB Pokal defeat against third tier side Sportfreunde Lotte.
Goals from Fabian Johnson and Lars Stindl sealed Borussia Monchengladbach's safe passage to the DFB Pokal third round.
Due to injury and scheduling, Borussia Dortmund's depth has been tested often this season. In the DFB-Pokal vs. Union Berlin it will be tested again.
Bayer Leverkusen were dealt a stunning second-round exit from the DFB Pokal as they fell to third-tier Sportfreunde Lotte on penalties on Tuesday.
Lotte came back from a goal down twice and beat Leverkusen in penalties to advance to the third round of the German Cup.