Barcelona sports chief Andoni Zubizarreta has defended the signing of Jeremy Mathieu.

The former Valencia defender, 30, joined Barca for €20 million this week.

When asked whether Barcelona had paid too much for the defender, Zubizarreta admitted that the amounts paid in football are "disproportionate".

"A 30-year-old footballer isn't over the hill," he, however, insisted.

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