Although a large part of Boro's business will depend on which division they find themselves in come the end of the season, those behind the scenes will already have one eye on potential targets. The free agent market proved successful for the Teessiders earlier this year following the capture of ex-Chelsea midfielder John Obi Mikel - but could Boro profit again? We take a look at some players whose contracts are set to expire this summer. Scroll down and click through the pages to look at some of the players who may be available:
While Boro appear well stocked in centre midfield, the Iceland international is a fierce competitor. Gunnarsson, 29, has been a regular for Cardiff in the top-flight this term and possess a threat with his long throws.
The Crystal Palace midfielder, 32, was linked with Boro in the summer but remained at Selhurst Park. He has since joined Huddersfield on loan but could be available at the end of the season.
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Boro's lack of pace and power in wide areas has been an issue all season. Sako possess both in abundacne but has struggled for game time on loan at West Brom this term.
Simpson has fallen down the pecking order at the King Power and has made just five top-flight appearances this term. Now 32, it seems likely the Premier League winner will be looking for a new club this summer.
A slightly ambitious one but Chelsea's captain has barely featured this term. Boro will also be hoping to win promotion this term, while John Terry's move to Aston Villa last season showed players are willing to take a step down.
Another one of Leicester's title winners who seems to be surplus to requirements right now. The Japanese international, 32, has played sparingly this campaign and looks to set to move on in the summer.
After playing a key role in Fulham's promotion to the Premier League last season, the midfielder struggled for game time in the top-flight. Johansen joined West Brom on loan in January where he's played four times.
After netting six Premier League goals for Huddersfield last campaign, Depoitre has struggled to kick-on this term. The 6 ft 3 forward could still be an asset though, through his Arial prowess and hold up play.
Another man who could address Boro's lack of pace in wide areas. Ayite also played a part in Fulham's promotion to the top-flight last campaign but has been starting on the bench in recent months.
The ex-Manchester United striker has rediscovered some form this campaign, scoring 11 Championship goals for the Tigers.
The Swiss international has been a regular at Carrow Road since his arrival at in 2016. Yet Klose, 30, has lost his place at centre-back in recent weeks following the impressive form of Ben Godfrey.
Johnson scored 15 Championship goals for Norwich in the 2014/15 campaign but hasn't been as prolific at Derby. He's still a player who can chip in with goals from midfield though, something Boro have lacked this season.
At his best the Ivotian international has shown he can be a real handful. His future aspirations are unclear though, following a loan move to Qatari club Al-Arabi in January.