Tottenham Hotspur striker Vincent Janssen "lost 20 minutes of his memory" after being involved in a clash with Belgium goalkeeper Simon Mignolet during Netherlands' friendly international fixture on 9 November in Amsterdam.
The 22-year-old made a switch to White Hart Lane from AZ Alkmaar last summer and since making a switch to the Premier League, he is yet to find form. So far, he has scored two goals in all competitions for Spurs and both have them come from the spot kick.
Janssen is yet to score from an open play for Mauricio Pochettino's side this season. Despite his poor form, he was selected to lead his national side's attack in their international friendly against Belgium at the Amsterdam Arena.
He lasted only 27 minutes and was replaced by Bas Dost after Mignlot's 50/50 punched clearance saw the Dutchman come off as the second best inside Belgium's box. Netherlands manager Danny Blind confirmed that Janssen lost 20 minutes of his memory after the clash with Liverpool goalkeeper as the tie with Belgium ended in a 1-1 draw.
"Vincent Janssen is going to be a very difficult story. The physician told me it is a concussion. He lost 20 minutes of his memory, and doesn't know what happened. We have to be careful with that and talk it through," Blind explained, as quoted by the Mirror.
Janssen's latest injury setback will be a blow for the north London club, who are without a win in seven matches played in all competitions. Tottenham face West Ham United and Chelsea in the league clash in November, which is sandwiched between the Champions League fixture against AS Monaco.
Harry Kane returned from injury for the first time since September in his side's 1-1 draw against Arsenal in the north London derby before the international break. The England international's return to full fitness will be a boost for Pochettino, but Janssen's injury setback will restrict his options for the upcoming fixtures.