Sergio Ramos
Sergio Ramos has been a central figure for Real Madrid in the past few seasons.Reuters

Manchester United have set their sights on acquiring world class defenders and the latest players linked to Old Trafford are Real Madrid's Sergio Ramos and Everton's full back Seamus Coleman.

With Sergio Ramos snubbing a new Real Madrid contract, Manchester United jumped on the opportunity to sign one of the best defenders in the world.

Reports suggest that Manchester United's first bid of around £35million was rejected and the Red Devils have reportedly improved their bid to around £42.5m, which still might not be able to land the defender.

Real Madrid wants Manchester United to up their price to £63million to land Ramos, reported Mirror. Louis van Gaal is interested in signing Ramos as he has got some incredible leadership qualities, something that the Manchester United defence lacked last season. But even Cristiano Ronaldo wants Ramos to stay at Real Madrid as he is one of the key figures for Rafa Benitez's side.

The Red Devils have not been able to fill the void after Nemanja Vidic left Manchester United. Ramos could be one of their best options.

But, apart from Ramos, Manchester United are also preparing a deal for Everton Defender Seamus Coleman, as revealed by sources to ESPN. Louis van Gaal needs to shore up their defence to emerge as title contenders and might bid for Coleman somewhere in the region of £15m.

Manchester United are aware about the importance of a good quality full back in modern day football, where they are constantly asked to go upfront and support from the wings. Hence, they were regularly linked to Dani Alves and Nathaniel Clyne.

They received a major setback as Alves signed a new contract with Barcelona and Liverpool are said to have beaten Manchester United for Clyne's signature.

As far as Manchester United's interest in the Everton defender goes, they even tried to snap him during the last two transfer windows, but it could not materialise. Having failed to attract neither Alves nor Clyne to Old Trafford, the Red Devils will have to make sure that Coleman signs for Manchester United.

If they manage to succeed in signing both Serio Ramos from Real Madrid and Coleman from Everton, these players will play an important role in solving Manchester United's defensive problems.