Having starred in 119 Liga games with the Lions, Carvalho is seen as someone who is ready to make the next step in European football, though his club have a huge €44 million release clause on him.
The Angola-born powerhouse has amassed 37 caps for his country, winning Euro 2016, and is eager to move to the Premier League with London offering an even greater attraction.More news: Toronto Blue Jays ride Marco Estrada past New York Yankees
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The Angola-born Portugal worldwide has earned an impressive 37 caps for the defending European champions, and is eager to move to the Premier League according to the report, with London offering an even greater attraction.
That has naturally made West Ham wary but they are hopeful they can broker a compromise involving Carvalho's new agent Pere Guardiola, brother of Manchester City boss Pep.
Arnautovic's deal - thought to be worth around £24m - already broke West Ham's transfer record this summer but could yet be surpassed as the club look to do more business.
Meanwhile, Hammers midfielder Sofiane Feghouli is said to be wanted by Turkish outfit Galatasary and midfielder Robert Snodgrass has emerged as a target of Championship club Aston Villa.