United States centre-back Matt Besler is a target for Bundesliga's SC Freiburg, according to Kicker.
The German club struggled to a 14th-placed finish last season, and are set to be hampered further by the potential exits of defensive pair Matthias Ginter and Diagne Fallou.
Eintracht Frankfurt's Marc-Oliver Kempf is expected to replace one of the outgoing stars, while the Breisgau side are weighing up other options - with Stefan Mitrovic of Benfica and Besler considered.
Freiburg had enjoyed their best campaign in almost two decades in 2012/13 as they qualified for the Europa League, but Christian Streich's men suffered a drop in form following Max Kruse's move to Borussia Monchengladbach.
They will now hope to return to the top half of the league table, and would be significantly aided by the signing of Besler. The 27-year-old featured in all four of his country's games at the World Cup, and impressed enough to attract several European suitors.
Despite the Stars and Stripes' second-round elimination at the hands of Belgium, a quartet of solid displays earned the 21-time international rave reviews and numerous links to clubs in both Germany and England.
This speculation has led to questions being asked of both the Sporting Kansas City defender and his manager.
Besler comments to reporters
Besler told the media: "I think that I've made it very clear how happy that I am in Kansas City, how grateful I am to play here. That hasn't changed at all. At the same time, in the position that I'm in right now, you may only get these kinds of opportunities once in your lifetime.
"I feel the need to at least look into potential opportunities and make a decision from there."
He later added: "It's a dream of mine to play here, and it would be a dream of mine to play my entire career here. But you can have other dreams as well. Maybe one of my other dreams could be to play in Europe. If that's one of my dreams, that's something I have to think about."
However, Wizards boss Peter Vermes remained optimistic about the chances of keeping his star player at Sporting Park.
Hopeful of stay
"I'd put our club up against the majority of clubs in the world. Obviously, we maybe don't compare in the fact that we don't have the same pocketbook they do, because of our salary cap.
"But outside of that: the facilities, the stadium, the game environment, fans, city to live in – this is the best country in the world, the United States, and you're living in Kansas City. You think about it. It's a great place."
Besler has spent his entire professional career to date with his hometown team in Major League Soccer, and helped SKC to the title in 2013 and the US Open Cup the year before. He is also a former MLS Defender of the Year.
Meanwhile, Kansas City announced the signing of Michael Kafari from Charleston Battery.
The Ghanaian midfielder had been selected in the third round of the 2014 MLS Superdraft by the Vancouver Whitecaps, having previously attended the University of New Mexico.
He will wear Sporting's number 24 shirt, and will play alongside former adidas Team Predator partner Victor Munoz.