Matthias Schrader/Associated Press
Guardiola was given a sharp wake-up call to be mindful of defense. Against Gladbach, he started Rafinha, Javi Martinez, Holger Badstuber and Juan Bernat ahead of goalkeeper Tom Starke. Bayern conceded a few chances in the first half but went 1-0 ahead before the interval. And four minutes after the break, it looked to be game over as Franck Ribery made it 2-0.
Within 26 minutes, however, Bayern conceded two penalties (one by each of the center-backs, Badstuber and Martinez) and were held to a draw in regular time.
Badstuber has the excuse of not playing competitive football for nearly two years. Before his successive cruciate ligament surgeries, he was an international-class center-back.
He still has some distance to go in his recovery, and that could mean that Guardiola will either have to use him as a still-recovering player or send him on loan to regain the sharpness that made him a reliable Germany international in previous years.
Martinez, though, was not exactly a reliable defender when used at the back last season and showed similar form for Spain in the instance in which he was used at the World Cup.
On Saturday, he clumsily conceded possession to Andre Hahn deep in his own half and then fouled the Gladbach winger inside the penalty area a few moments later.
Martinez is a world-class holding midfielder but is decidedly not a center-back. Guardiola should take note of this reality with Jerome Boateng and Dante soon returning to the squad.