Date of birth
The former Salzburg defender signed a short-term deal last summer after impressing during the early stages of a trial, which was cut short by injury.
Manager Gareth Ainsworth gave the German the chance to prove himself once he returns to full fitness, and handed the centre-back his debut in the Checkatrade Trophy at Millwall in December before extending his deal until the summer of 2018.
Muller went on to make 12 appearances in 2016/17, at the heart of the Chairboys defence.
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