Manchester City are battling with Real Madrid to try and secure signing of Espanyol talent Aaron Martin.
The 19-year-old left back has a £26million release clause in his contract, which runs until 2022, and has been a big part of what has been a good campaign for the Catalan club.
According to The Sun, that buyout figure would rise to nearly £35m in 2018 and Espanyol are under no pressure to sell.
Guardiola will reportedly be given a huge transfer budger this summer as City try to move forward from a difficult first campaign under the Spaniard.
With Pep Guardiola eager to strengthen his full-back options, an early deal would be preferable so City do not have to overpay.
He faces competition however, as Zinedine Zidane of Real Madrid has entered the race to sign Martin.
The Frenchman has reportedly given up on Fabio Coentrao, with Marca claiming Zidane sees Martin as a perfect back-up and potential long-term replacement.
Coentrao has made just three appearances for Los Blancos this season and it is believed his six-year stint at the Bernabeu is coming to an close.