"We will see how it goes from day-to-day", Loew told reporters.
Kahn believes the Barcelona keeper is a reliable option for the World Cup too, if Neuer is not considered for selection.
Germany, who claimed their fourth world title in Brazil in 2014 courtesy of Mario Gotze's extra-time victor against Argentina at the Maracana, named 27 players in their provisional squad for next month's competition.More news: Cavaliers own 2.8 percent chance at No. 1 pick in draft lottery
Mario Gomez could add to his 73 caps in Russian Federation, having previously played in Euro 2008, the 2010 World Cup, Euro 2012 and Euro 2016.
BC-SOC-WCup-Germany Squad, 1st Ld-Writethru, 510Neuer makes Germany's initial World Cup squad; Petersen, tooAP Photo DSOB101, MME112, FOS103Eds: Updates with quotes, more details, squad list.
"Marco is a special weapon, he has special gifts", Loew said of the forward. "I know that those players are just very disappointed because they worked hard for it. Sandro has shown his class when with the team". "I expect quite a bit from him for the tournament".More news: 'The House That Jack Built' Trailer Shows Off Brutality
However, Loew pulled a surprise by handing a first call-up to Freiburg striker Nils Petersen, 29, the top-scoring German in the Bundesliga this season with 15 goals.
His club-mate Gotze, who scored the winning goal in the final as Germany triumphed four years ago, misses out, however, after struggling for fitness and form at Signal Iduna Park this term.
Germany face Mexico, Sweden and South Korea in World Cup Group F and will prepare in the Italian Alps ahead of the tournament in Russian Federation.More news: Kristen Stewart makes a political statement, ditches heels on Cannes red carpet
In the build-up Germany face a warm-up friendly against Austria on June 2, and another versus Saudi Arabia six days later.
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