Monte Carlo, May 21 -- : Formula 1 is back in Monaco and Ferrari are back at the top of the timesheets. The Scuderia's one-two in FP2 on Thursday, and their improvement since Spain, surprised world championship leader Lewis Hamilton, though the Briton said he was delighted to welcome more competition to the sharp end of the grid. Hamilton, a Monaco resident and three-time winner of the race, clearly enjoyed his return to this revered street circuit, finishing fifth in FP1 and third in FP2 -- a session in which he was eclipsed by some familiar rivals in red, as Ferrari topped the latter session with Charles Leclerc ahead of team mate Carlos Sainz. The reigning champion said afterwards he was keeping an eye on Ferrari's pace, but began by exp...