Celtic defender Virgil van Dijk should resist interest from Arsenal and Manchester United and stay in Scotland, warns Frank de Boer.
The 23-year-old has made 10 appearances in the Scottish Premiership this season, scoring the winning goal against Aberdeen that put Celtic top of the table last weekend.
It is understood that Van Dijk has been targeted by Arsenal to help solve their defensive woes but his fellow Dutchman believes that he should first look to win things at Parkhead.
"When Virgil signed for Celtic, I knew he had everything to go on and be a top central defender, both in Scotland and in Europe," the Ajax coach told the Daily Record.
"I thought he had the attributes to go on and become one of the best players in the SPL so it is no surprise to me that is exactly what he has done.
"It is also no surprise to me that he is being linked with clubs like Arsenal and Manchester United. They are both in the situation where they could use another top central defender and they are not easy to find.
"I am sure that he could be a success for any club in Europe but Celtic will know exactly what they have and no coach will ever want to sell in January.
"It is such a difficult window to sign players that you don't want to lose your best one during it.
"It would be good for him to win trophies in the SPL first before he thinks about anything else; it will all be a part of his education."