At the age of 20, Hayden Muller has four senior Millwall appearances to his name, in addition to a lengthy loan spell in Scotland at St Johnstone.

The right-back - who is equally comfortable at centre-back and can play in midfield - made his debut on the final day of the COVID-19-hit 2019/20 campaign at home to Huddersfield Town, and went on to make three further appearances in the following season.

Muller then got a taste of football north of the border at McDiarmid Park, making eight starts in the SPL.