Sainz will join teammate Charles Leclerc on the front row of the grid for Sunday’s Mexico City Grand Prix after surprising everyone in Q3.In the lead up to the final segment of qualifying, it looked like Ferrari was a step behind Red Bull and Mercedes in the fight for pole.Leclerc and Sainz claimed first and second after the initial runs in Q3 - where they stayed - as Max Verstappen was unable to topple them.When asked about Ferrari’s upturn in form in the latter part of qualifying, Sainz couldn’t explain it.“Honestly, it was a very strange one,” Sainz said.“I've struggled…