Germany held to 2-2 draw by Mexico in Nagelsmann's second match
Germany, who beat the United States 3-1 on Saturday, opened the scoring in the 25th minute through Antonio Rudiger when the defender headed home following Leroy Sane's corner.
Uriel Antuna converted Hirving Lozano's cross to level the score 12 minutes later and Mexico went 2-1 up shortly after halftime when Erick Sanchez headed in Antuna's cross.
The lead did not last long, however, with Niclas Fullkrug equalizing in the 51th minute after Florian Wirtz's shot was cleared off the line by Mexico goalkeeper Guillermo Ochoa.
"I'm happy not only for my individual work but also for what we did as a group," Antuna said of Mexico's performance.
"The team, despite being down, always attacked, always defended until the last minute, it is important to tell the fans that together we can do many important things and compete.
"The job is to be consistent, since Jimmy's (Lozano) arrival the team has been working step by step," he added.