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Dutch defender Martins Indi stays behind in Porto Alegre after suspected concussion

Netherlands' Robin van Persie, left, gives a high five to Netherlands' head coach Louis van Gaal after being substituted during the group B World Cup soccer match between Australia and the Netherlands at the Estadio Beira-Rio in Porto Alegre, Brazil, Wednesday, June 18, 2014.  (AP Photo/Michael Sohn)

Netherlands' Robin van Persie, left, gives a high five to Netherlands' head coach Louis van Gaal after being substituted during the group B World Cup soccer match between Australia and the Netherlands at the Estadio Beira-Rio in Porto Alegre, Brazil, Wednesday, June 18, 2014. (AP Photo/Michael Sohn)  (The Associated Press)

Netherlands defender Bruno Martins Indi remained behind in Porto Alegre after sustaining a suspected concussion in the 3-2 win over Australia at the World Cup.

While the squad traveled back to its base in Rio de Janeiro and trained Thursday, Martins Indi stayed overnight in the hospital for observation after he was hurt in a tackle by Tim Cahill in Wednesday's Group B game. He was expected to rejoin his teammates later Thursday in Rio.

Winger Arjen Robben and midfielder Nigel de Jong also sat out Thursday's session when the Dutch trained in the rain in Rio.

Striker Robin van Persie took part in light warm-up drills then climbed to the top of the steep stands overlooking the field to sit with his wife and children and watch.