Southampton captain Virgil van Dijk has not been included in their squad for a training camp in France this week.
The defender, 26, has been strongly linked with a move to Liverpool, although the Anfield club said they ended their interest last month.
Southampton say they do not want to sell the Netherlands international.
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Saints boss Mauricio Pellegrino said last week that Van Dijk had been training alone because he feels the player is “not 100%” mentally.
Van Dijk, who joined Southampton in 2015 from Celtic, travelled with his team-mates for a pre-season tour in Austria earlier this month but has been left out of Pellegrino’s 25-man squad heading to France.
Southampton will play Saint Etienne in a friendly on Saturday as they prepare for their Premier League opener at home to Swansea City on 12 August.
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