Bayern Munich have strengthened their squad by signing defender Serdar Tasci on loan from Spartak Moscow until the end of the season. Tasci, 28, has been capped 14 times by Germany and was at Stuttgart in 2007 when they won the Bundesliga. “Thanks to his quality and experience, he’s in a position to help us at once,” said Bayern’s sporting director Matthias Sammer. Javi Martinez and Jerome Boateng are among several Bayern players injured. Tasci has been at Spartak since 2013 and has started 16 of their 18 league games this season. Bayern have the option to make the signing permanent.