Reus, meanwhile, appears to finally have a chance to play in a World Cup, having returned to form and fitness at Borussia Dortmund since his comeback from injury in February. He has been named amongst four goalkeepers, one of whom will be cut for the final 23-man squad which must be named by June 4.
Petersen helped his club stay in the Bundesliga with 15 goals in 32 league appearances, eight of those as a substitute. We will be open and honest after the training camp, and without match practice, you can't go into a tournament.
Loew, whose current deal runs out in 2020, has been in charge for 12 years and in 2014 led Germany to their fourth World Cup title. "But you can not go into such a tournament without match practice".
Loew left out midfielder Goetze, who scored the winning goal in the final against Argentina four years ago but has had a lacklustre season. "He has huge qualities, but isn't in form", explained Loew.
Mile-long lava path flows towards ocean in Hawaii
As a precaution, plant workers last week removed 50,000 gallons (189,265 liters) of a flammable liquid stored at the site. Lava from another fissure that opened over the weekend is making a path for the ocean, about 2 miles (3 kilometers) away.
"I personally enjoy working with so many inspiring people".
Loew opted for Petersen over Bayern Munich forward Sandro Wagner, giving the Freiburg player his first call-up to the national team after an excellent season.
Goalkeepers Manuel Neuer and Nils Petersen made it into the provisional squad whereas midfielder Mario Goetze and striker Sandro Wagner have not been included.
Yet there is no place for striker Sandro Wagner, Robert Lewandowski's back-up at Bayern Munich, who helped Germany win the Conferderations Cup in Russian Federation previous year.
Germany are in Group F with Mexico, Sweden and South Korea in this summer's tournament in Russian Federation.