Dundee United player-manager Craig Brewster will not be following up his interest in defender Lindsay Wilson.
Wilson played with Kilmarnock last season
The 27-year-old Australian was on trial with United during their tour of Denmark, along with Jeppe Hestehave, who has also been discarded.
Wilson, who was on loan at Kilmarnock last season, has now returned to Dutch club PSV Eindhoven.
"Lindsay played both the games we had in Denmark but it just didn't work out," said Brewster.
Wilson and Hestehave, formerly of FC Copenhagen are both right-backs.
And Brewster is also anxious to fill the left-back role after loan signing Charlie Mulgrew's return to Celtic.
Hearts have already rejected United's bid to take Lee Wallace on loan.