Daniel Ayala has been linked with Leeds United while Jonathan Woodgate's Boro might lose Adam Clayton and Jonny Howson too.
Leeds United are gearing up for another season in the Championship after their agonising play-off defeat.
Middlesbrough sit joint-top of the Championship table after six games.
Middlesbrough beat Birmingham City 1-0 to continue their unbeaten start to the 2018/19 Championship campaign.
Should Leeds United take another run at the Middlesbrough man?
The Middlesbrough midfielder is out-performing Leeds United's Eunan O'Kane this season.
Leeds United could have nabbed Jonny Howson back from Norwich City this summer - but brought in the seldom-seen Klich instead
Middlesbrough will face Leeds United at Elland Road in the Championship this afternoon.
Leeds United were linked with re-signing Jonny Howson before Middlesbrough swooped in.
Norwich sold Howson to Middlesbrough earlier in the summer.
Raheem Sterling joined Manchester City from Liverpool in 2015.
Emery flogged Valencia starlet Isco in 2011 and, almost a decade on, could the Real Madrid star be on his way to the Premier League with the Gunners?
Arsenal striker Pierre-Emerick Aubameyang is reportedly wanted by Inter Milan.
Giovani Lo Celso signed a permanent contract with Tottenham Hotspur in January.
Ibrox side Glasgow Rangers are 10 points behind Celtic.
Marcelo Bielsa has suggested that Ian Poveda does not need any more 'adaptation' to be ready to play for Leeds United.
Liverpool defender Andy Robertson has shaken off an ankle knock over the winter break.
Tottenham Hotspur boss Jose Mourinho has already given Japhet Tanganga his big chance.
Kiko Casilla and Patrick Bamford will play for Leeds United this weekend, says Marcelo Bielsa.
Liverpool are said to be interested in Borussia Dortmund's Jadon Sancho.
The recently departed Wolverhampton Wanderers manager is leading the race to become Hull City's next boss.
Norwich City fans have issued a warning to Leeds United about their star midfielder.
The Bradford City defender, who was recently named in League One's team of the season, was linked with a move to Norwich City earlier in the year.