Ronaldo moved to Juventus because of Messi, Giggs reveals

The union added that it was "unacceptable" that while Fiat Chrysler workers were making "huge economic sacrifices", millions of euros were being spent on the purchase of a player.

Workers at a Fiat Chrysler plant in Italy are to strike after its main investor chose to pay €112m (£99.2m) to sign footballer Cristiano Ronaldo for Juventus.

The bigger unions criticized USB's move as "mere advertising", saying it was "incredible that in such a delicate phase for the FCA group. someone is calling for a strike on a matter that has nothing to do with work and with workers".

Juventus paid 100 million euros (roughly $117 million) to secure Ronaldo's departure from Spain, with an additional 12 million euros (roughly $14 million) in a fees to sign the 33 year old to a four-year contract, ESPN reported.

Cristiano Ronaldo's agent Jorge Mendes has said that Juventus would be the Portugal captain's last club where he closes his "marvelous" career.

Ronaldo completed a sensational €100million switch to the Serie A champions earlier this week, bringing an end to his successful nine-season stay in Madrid. "That means more sponsors, more TV money and more prize money".

The powerful Agnelli family including Juventus' president Andrea Agnelli co-own the Turin-based club and Fiat.

Real Madrid have today issued a statement addressing the rumours linking Neymar with a move to the club, in which they state that they have no intention of signing the player.

Union members working at the plant, where Fiat models such as the Punto and 500X are made, will walk out at 10pm local time on Sunday night, remaining on strike until 6pm on the following Tuesday.

The independent union conducting the strike is not part of the larger national labour confederations and does not represent all workers at Melfi.