MIDDLESBROUGH should complete a double breakthrough on the transfer front within the next 48 hours when Marten de Roon and Jordan McGhee arrive on Teesside to seal moves.

De Roon will undergo a medical and discuss the finer details of a reputed £1m-a-year contract ahead of completing a €12m move from Italian club Atalanta.

And then Hearts’ teenage defender McGhee should finally complete a loan move from Tynecastle, six months after a similar switch broke down at the last minute on deadline day.

Hearts have already reached an agreement with Middlesbrough and the 19-year-old will head for the Riverside on a season-long loan. He should join in with the majority of the early pre-season training sessions, which will get underway on Monday.

There will be an option for Middlesbrough to buy the centre-back, who can also play full-back, at the end of their first campaign back in the Premier League.

McGhee will initially be part of the Middlesbrough Under-21s team but Aitor Karanka will keep a close eye on him in the hope he forces his way into the first team thinking.

The Scotland Under-21 international has been watched by a number of English clubs and he only has 12 months remaining on his existing deal at Tynecastle.

Earlier this year he revealed how disappointed he was not to get the paperwork done in time to move to Middlesbrough in the winter transfer window.

McGhee previously said: “On the night of deadline day, I knew for some time the indication it was going to happen.

“We ran out of time basically. My agent kept me up to date, I knew what was happening. My bags were packed to go to Middlesbrough. Then I got the call to go back to Edinburgh.

“Middlesbrough are such a massive club fighting for promotion to the Premier League. It was a great opportunity for me, to go and work with great coaches. It was a really enticing club to go to. It was disappointing.”

McGhee has had a number of clubs chase his signature over the last couple of years, including Sunderland, but Middlesbrough’s persistence has eventually led to them landing him but they will monitor him over the nine months before deciding whether to sign him permanently.

Aitor Karanka – who will do everything he can to keep Daniel Ayala amid interest from Newcastle - is still working on a number of further additions to his ranks and is looking at ways of beefing up his defensive options.

Former Juventus defender Martin Caceres, who Karanka is familiar of from his time in Spain, is a free agent and under consideration. The Uruguayan, 29, has won the Serie A title in each of his last five years.

If he did move he is likely to follow de Roon from Italy, barring any late complications. The Dutch midfielder will be at Rockliffe Park when the rest of the squad are put through the first pre-season training session of the summer.

Bernando Espinosa, signed from Sporting Gijon, will be among the players but £3.8m buy Viktor Fischer has been given extra time off because of his international commitments with Denmark last month.