American striker Jozy Altidore, who has been in terrific form for AZ Alkmaar this season, left the Dutch Eredivisie match at Nijmegen in the 34th minute Wednesday with an apparent head injury.

Video of the incident is at the 1:11 mark.

The setback comes two weeks before U.S. national team camp opens in preparation for friendlies against Scotland, Brazil and Canada, and World Cup qualifiers against Antigua and Guatemala.

Altidore has scored 15 goals in league play and four in the UEFA Europa Cup — his most productive campaign, by far, since 2007 with the New York Red Bulls. AZ, which began the day fourth in the 18-team league, will play its season finale Sunday against Groningen.

In qualifying news, the USA home match against Jamaica on Sept. 11 will take place at Columbus Crew Stadium, the USSF announced.

For the rundown of other Americans in action today.....

GK Brad Friedel 90 minutes in Spurs’ 4-1 win at Bolton

D Tim Ream 90 for Bolton

F Charlie Davies in the 18, didn’t play in Sochaux’s 2-1 loss at Ajaccio

D Carlos Bocanegra 90 minutes in Glasgow Rangers’ 5-0 win over Dundee United

MF Maurice Edu 90 for Rangers

MF Alejandro Bedoya 15 (goal) for Rangers

MF Sacha Kljestan 10 minutes in Anderlecht’s 1-0 win over Gent

MF Mikkel Diskerud 10 minutes for Gent

D Michael Parkhurst 90 minutes in second-place Nordsjaelland’s 1-0 win over first-place Copenhagen