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It was down to work for Manuel Pellegrini and his players on day one of their pre-season training camp in Switzerland on Tuesday and the new manager eased the 30-strong squad into his regime.

But they will not be allowed to rest on their laurels for very long as the Chilean manager is set to crack the whip towards the end of the week in preparation for the friendly against FC Winterthur on Sunday afternoon.

More on that later but for the first day of the camp, the players were involved in a 90-minute session in eastern Switzerland where they were assessed further by the new coaching staff at the club, having started the process back at Rush Green on Monday morning.

Before the session got started, the new manager spoke to the 30-strong playing group as a collective, no doubt outlining his plans for the coming days in the country, for a five-minute prep talk before training begun.

The players started with a warm-up run in very humid conditions at the training ground of Swiss third division side FC Bad Ragaz.

After that, the intensity went up a notch as assistant manger Ruben Cousillas, first team coach Enzo Maresca, fitness coach Jose Cabello and his assistant Felix Cao laid out a circuit of fitness drills for the players to get to grips with, both with and without a ball, to start building up their fitness levels.

Away from the main group, goalkeeping coach Xavi Valero worked with Adrian, U23 stoppers Nathan Trott and Joseph Anang, and also a new name to many Hammers fans, U18 keeper Daniel Jinadu, on a series of specialised drills for their footwork, handling.

Maybe something interesting here and a sign of how Pellegrini wants to play, Valero also got the keepers working on their distribution skills.

The session ended with an eleven-a-side match on a one-third pitch, with players allowed just one touch to start with before it progressed to the dizzying heights of two touches and further. According to the Hammers official website, the "non-bib" team won 2-0 thanks to goals from Jordan Hugill and Declan Rice.

Throughout the hour and a half of training, each player was equipped with a GPS tracker (not in case they got lost) to monitor distance covered, sprints made, top speed and average speed.

Also away from the group, those who are currently rehabbing from injuries were looked after by physiotherapist Dominic Rogan. Winston Reid was his main client on day one, while Michail Antonio worked with rehab fitness coach Eamonn Swift.

remember where we said the training is about to intensify? Well, it won't on Wednesday as there is just another single session planned for day two but on Thursday and Friday, Pellegrini has got TRIPLE sessions planned for the squad to build up to the friendly on Sunday.

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