Diogo, who is 26, started his career as a youth playing for several clubs in Portugal, as well as for Watford.

He signed for Dulwich Hamlet in 2019 and played for them in National League South, before moving to Xylotymbou in Cyprus and then Mount Druett Rangers in Australia.

Darlington manager Alun Armstrong said; “He’s a box-to-box midfielder. He’s nice and aggressive, very tidy and very technical. Sometimes you lose that physicality with the technical players we’ve got. I’ve been impressed by what he’s done in training. He’s got a good pedigree, he’s played in the National League before and is something different.”