The newly promoted Ligue 1 team had plenty of competition for both, but have signed the pair for a combined 70 million euros from the Portuguese champions.
Monaco have also recently been linked with Radamel Falcao, Carlos Tevez and Wayne Rooney among others.
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Chelsea have struggled to build momentum in the opening stages of the campaign and are currently looking over their shoulders at the relegation zone.
Who of Europe’s top strikers will move to England this summer?