Calderwood has had good reports about Davids

Sefanja Davids - the nephew of Netherlands midfielder Edgar - is one of three trialists being given the chance to win a contract with Aberdeen.

Davids, previously with Feyenoord, has been joined at Pittodrie by former Walsall goalkeeper Bertrand Bossu and ex-Cardiff striker Iwan Redan.

Boss Jimmy Calderwood told the Dons' website: "He is a left-sided central defender who comes highly recommended.

"He'll need to get used to the pace here but can certainly play."

Redan played just twice while on loan to Cardiff and was released on his return to Willem II after three years with the Dutch outfit.

MY SPORT: DEBATE Lets just hope one of three is worth keeping. Davids sounds promising Hans_Gilhaus

The 27-year-old, who also recently had a trial with Aris Thessaloniki, started his career with Vitesse and became a first-team regular after moving to RKC Waalwijk.

Frenchman Bossu made just one appearance in his two years with Walsall.

The 27-year-old began his career with RC Lens before heading for Barnet, Gillingham and Darlington.

Meanwhile, Calderwood is talking to the agents of defender Alan Maybury and midfielder Stuart Duff about contract extensions.

The manager believes both are keen to remain at Pittodrie.