Former Formula 1 driver Juan Pablo Montoya believes McLaren will emerge as Mercedes' primary challenger at this weekend's Barcelona-Catalunya Grand Prix, despite the Woking outfit's struggles in Monaco.<br>Mercedes arrives in Barcelona with impressive momentum, led by championship leader Kimi Antonelli's run of five consecutive grand prix wins, but Montoya expects a renewed threat from Lando ...<a class='more' href='https://www.motorsport.com/f1/news/juan-pablo-montoya-names-mercedes-biggest-threat-in-barcelona/10829591/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-F1&utm_term=News&utm_content=www'>Keep reading</a>