Monaco is unique in several ways to other Formula One events, this includes holding their free practice sessions on a Thursday rather than a Friday.
In First Practice today Mercedes dominated with Hamilton leading Rosberg. They were followed by the two Red Bulls and Ferrari’s (Ricciardio 3rd, Alonso 4th, Vettel 5th and Raikkonen 6th). Bottas, Perez, Magnussen and Hulkenberg filled the remaining top 10 places.
Although it is often difficult to predict how the race will unfold from Practice 1 times, it looks like that the main challenge from Mercedes will come from the Red Bull’s and Ferrari’s for qualifying and hopefully the race as well.