Hearing of von François's actions further north, von Mackensen attacked Rennenkampf's III Corps at 08:00, but von Below was not able to join in until noon.
Aflând de acțiunile lui von François din nord, von Mackensen a atacat Corpul III al lui Rennenkampf la orele 08:00, dar von Below nu i s-a putut alătura decât la prânz.