Argentinian striker Lisandro Lopez has signed a five-year deal with French club Lyon worth €24m.
The 26-year-old centre forward signed from Porto, with whom he was the Portuguese league's top scorer in the 2007/08 season, finding the net 24 times.
Last season he garnered a more modest ten goals, but he has also scored 13 times in 28 UEFA Champions League games for the Portuguese champions.
The deal, valued at €24m with a further €4m payable in result-related bonuses, is the highest ever player fee paid by the deposed French champions.
Lyon, who failed to lift an eighth straight league title last season and must go through the UEFA Champions League qualifying round, are in transition and Lopez is their first summer signing.
A statement from the club read: "Olympique Lyonnais can confirm the signing of Argentina international Lisandro Lopez for an amount of €24m in favour of FC Porto, plus an additional €4m linked to results.
"Lisandro Lopez today signed a professional contract for five years with OL after passing a routine medical."