10. James Rodriguez (Real Madrid)
Age: 23
Contracted until: 2020
Estimated value: £46m-£51m
Although there is little danger of James leaving Real after his £60m arrival in 2014, Madrid would struggle to get all of their money back for the Colombian playmaker, who enjoyed a solid, if unspectacular first year at the Bernabeu.
9. Alexis Sanchez (Arsenal)
Age: 26
Contracted until: 2018
Estimated value: £51m-£55m
Arsene Wenger dipped into the market for a world-class player last summer, spending upwards of £30m on Sanchez. After a 25-goal first season at the Emirates, that has proven to be money very well spent.
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