TORONTO -- Toronto FC manager Ryan Nelsen fears Brazilian midfielder Jackson could face a suspension for an off-the-ball incident on the weekend.

Jackson was yellow-carded in the 50th minute for an apparent elbow as players jostled in the buildup to a free kick in Saturday's 1-0 win over D.C. United.

Nelsen says the league is looking into the incident and suspects a ban may be coming.

The TFC manager says D.C. United midfielder Davy Arnaud provoked the Brazilian, while acknowledging his player should not have retaliated.

Toronto travels to Utah this weekend to play Real Salt Lake.