Former Formula 1 driver Juan Pablo Montoya has warned that Mercedes may need to rethink its development strategy, arguing that the Brackley outfit must begin delivering upgrades "quicker" to avoid falling behind in the mid-season development race.<br>Speaking ahead of the Austrian Grand Prix on F1 TV's Weekend Warm-up show, the seven-time grand prix winner discussed the Toto Wolff-led team's ...<a class='more' href='https://www.motorsport.com/f1/news/mercedes-told-to-speed-up-f1-upgrades-as-ferrari-pressure-builds/10833859/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-F1&utm_term=News&utm_content=www'>Keep reading</a>