Leon Dajaku has signed for Sunderland permanently after a clause in his loan deal from Union Berlin was activated in the aftermath of promotion to League One.

Every transfer completed by Sunderland, West Brom, Middlesbrough, Norwich, Stoke and other Championship clubs so far this summer

Sunderland strengthened their defensive options by completing the signing of Daniel Ballard from Arsenal – while some of their Championship rivals have also been busy in the transfer market.

Ballard has signed a three-year deal at the Stadium of Light, with a club option of a further year, after making 31 Championship appearances on loan at Millwall last season.

The 22-year-old became the Black Cats second signing of the summer, after Leon Dajaku’s move from Union Berlin was made permanent due to a clause being triggered in his loan deal.

Making the step up to the Championship will be challenging, though, with many teams operating with bigger budgets and some having the advantage of Premier League parachute payments.

Here are all the signings that have been made by Championship clubs so far this summer:

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