Southampton's Virgil van Dijk is staying put - Claude Puel

Southampton manager Claude Puel is determined speculation over the future of key men like centre-back Virgil van Dijk will not unsettle his squad as they prepare for a crucial period of the season.

The Saints responded to the disappointment of an early Europa League exit and the loss of striker Charlie Austin to a shoulder injury by beating Middlesbrough 1-0 at St Mary's on Sunday.

Reports have claimed Van Dijk -- now with the same representatives as Everton manager and former Southampton boss Ronald Koeman -- could be a Toffees target when the transfer window opens in January.

Puel, though, dismissed any suggestion Saints players were likely to be on the market as he remained focused on the job in hand of getting a result at Stoke City on Wednesday night.

"It's not true. After the other thing it's just speculation,'' Puel said when asked about a reported £25 million buyout clause in Van Dijk's contract. "If he [Van Dijk] wants to change agent, it is not a problem for me.

"After this no comment about speculation, just to say that Virgil is an important player for the team, for Southampton, of course. For me it is not a possibility to see him [move] away. It's important to consider this in this moment and to not speak further about this.''

The Saints head to Stoke in 10th place for the start of a run of games against sides around them in the Premier League table, with an FA Cup third-round tie at Norwich and EFL Cup semifinal with Liverpool also coming up.

"To win the last game [against Boro], to come back after a big disappointment in a European game, shows the strong character of my team," Puel said. "To continue this work and to stay now in the first part of the table is very important from us and I think we will see this.''

The Saints boss expects Stoke to offer a response of their own following a 3-1 defeat at title-chasing Arsenal.

"It will be a strong game against, I think, a very good team with great players,'' he said. "They have great offensive players with much potential playing for them, like [Xherdan] Shaqiri, [Joe] Allen, [Jon] Walters or [Wilfried] Bony and [Marko] Arnautovic -- it is impressive.

"However, it is important to stay with good concentration about our own play and possibilities. We finished with a good second-half and a very good result in our last game and now it's important to find a good regularity for the next game and to take all the points if we want to do something for the second half of the season.''