Pochettino is keen to freshen up his squad.
He said, "These are the most dangerous games because now we have to keep the same mentality.
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"West Ham are a strong team, with great physicality, and they have had a fantastic season.
"They have been competing well in Europe and for us, we need to recover and maybe add some fresh legs to our squad because West Ham have had a whole week to prepare - that is why these are the most dangerous games."