Celtic run rule over Japan star Yamada
Japan international Hiroki Yamada is training with Celtic this week.
The 24-year-old midfielder plays for Jubilo Iwata in his homeland and Hoops boss Neil Lennon has previously spoken of his admiration for the player, who has played twice for the Japanese national side this year.
Lennon said earlier this month: "We're looking to bring him over to take a look at him. John Park (head scout) has watched him a couple of times and we've seen some footage.
"However, it's always good to see him up against the rest of the players and how he copes with it. He can play left side or off the striker.
"He looks okay but we'll not have a real idea until we've seen him over here. I don't think there would be any money involved -- he's a free."
Meanwhile, skipper Scott Brown believes Celtic can remain unbeaten in the league for the rest of the season.
Following the 6-1 Champions League defeat by Barcelona in the Nou Camp last week which ended their European aspirations, the Hoops responded with a 1-0 win over Hibernian at Parkhead on Saturday, which extended their unbeaten run in the Scottish Premiership this season to 15 games.
Asked if Celtic could remain undefeated through the entire campaign, Brown did not rule it out. "We are a tight group and we are strong, and I think if we put our minds to it we can definitely do it," he said.
Celtic will have to contend with a heavy festive fixture list which sees them host Hearts on Saturday, before taking on St Johnstone, Inverness and Partick Thistle in the space of six days.