Ex-Germany captain Lothar Matthaeus has said he would expect Bayern Munich midfielder Toni Kroos to turn down a potential bid by English Premier League giants Manchester United.

There is speculation in the English media that United will table a bid for the 24-year-old German having already signed Spanish attacking midfielder Juan Mata from Chelsea.

"I presume Kroos will extend his (Bayern) contract in the near future, even if he has offers from abroad," Matthaeus, 52, told Sky Sports in reference to United.

United manager David Moyes flew to Germany to join Kroos' agent Sascha Breese in watching Bayern's 2-0 win at Borussia Moenchengladbach on Friday.

Kroos was outstanding as Bayern extended their record unbeaten Bundesliga run to 42 matches and opened a ten-point gap at the top of the table.

Having made 41 appearances for Germany, Kroos is out of contract with Bayern in June 2015 and the European champions are eager to extend his deal.

Matthaeus played for Bayern during two spells in his career and still has strong ties with the European champions.

He insisted live on air that Borussia Dortmund striker Robert Lewandowski would join Bayern -- a year before the deal was confirmed three weeks ago.