Russia has banned its football clubs from signing Turkish players, according to Russian sports minister Vitaly Mutko.
Tensions between the two countries have increased after Turkey shot down a Russian jet last week, which Russia president Vladimir Putin responded to by announcing a host of sanctions including restrictions on imports of some Turkish goods and a ban on charter flights.
The sanctions have also spilled into the world of sport as Mutko, who is also president of the Russian Football Union (RFU), revealed that Turkish players would not be allowed to move to Russia during the next transfer window.
"I think that, if anyone wants [to sign a Turkish player] during the upcoming transfer window in the winter break, there will not be such a possibility," he told the R-Sport news agency in quotes reported by Reuters.
"We don't need to jump too far ahead but [the clubs] have already got the message."
Asked whether the sports ministry was categorically telling clubs not to sign Turkish players, Mutko replied: "Of course, absolutely."
However, the ban will not affect any player currently registered with a Russian club, such as Rubin Kazan midfielder Gokdeniz Karadeniz.
"Everyone who has an existing contract will carry on working," Mutko added.
The sports ministry has already recommended that Russian clubs cancel any planned winter tours to Turkey, but Mutko said that any Turkish company involved in constructing stadiums for the 2018 World Cup in Russia would be allowed to continue.
"They won't be here in the future but at the moment they have contracts and these will not be looked into," he said.