Mercedes looked dominant but was a flaw in their W11 car revealed? Meanwhile are Ferrari and Red Bull shaping up for a championship charge? Here's what the second week of testing unveiled...

For more F1® videos, visit http://www.Formula1.com

Like F1® on Facebook: https://www.facebook.com/Formula1/

Follow F1® on Twitter: http://www.twitter.com/F1

Follow F1® on Instagram: http://www.instagram.com/F1

#F1