Even despite a loss against Borussia Monchengladbach a few weeks ago, Bayern Munich are still in a fairly comfortable position heading into the German Bundesliga's lengthy winter break. With no domestic fixtures on the schedule until January 22nd and no Champions League games on the horizon until a February 23rd clash with Arsenal, the Bavarians can turn their full attention to a completely different focus: the January transfer window.

By virtually any measure, Bayern Munich are having a great season. As a result, the German heavyweights could probably get away with sitting the transfer window out and waiting until summer to sign any new talent. However, it's likely that the Bavarians will make at least a few moves, and we've got all the biggest Bayern Munich winter 2015 transfer rumors outlined below.

An Arjen Robben Exit?

One of the loudest rumors about Bayern Munich's transfer prospects for January isn't about who the football club could pull in, but who they might let go. According to speculation, veteran winger Arjen Robben has agreed to make a move to Manchester United in January. The 31-year-old-who has been at Bayern Munich since 2009, tallying 208 appearances and 176 goals in that time-has supposedly had a falling out with Robert Lewandowski and is looking for a way out.

The question here is whether or not Bayern Munich will let a big name like Robben go during the January transfer window. Robben has been valuable to the Bavarians since arriving in 2009. In 2014, he finished fourth in the voting for the Ballon d'Or Award. He's aging, sure, but he still contributed 17 Bundesliga goals last season and could absolutely still be valuable.

On the other hand, Robben has definitely seen limited play time this season. It's hard to know whether or not that reduction in play has anything to do to this supposed falling out with Lewandowski. If it does, though, Bayern might be wise to let Robben go in January. His contract goes through 2017, which means they will be looking to sell him soon if they want to make any money off his departure. And since Lewandowski has been more valuable to the Bavarians as of late, it makes sense that the football club might jettison a player who doesn't get along with him.

Poaching Monchengladbach's Best?

Another recent rumor is that Bayern Munich are looking to sign 23-year-old midfielder Granit Xhaka from Borussia Monchengladbach. Some reports suggest that Xhaka could be a natural successor to Xabi Alonso. Xabi, who moved to Bayern in 2014 on a two-year contract, could be the subject of a few transfer bids in January himself, given the fact that his contract is up at the end of the season and Munich may be looking to sell.

Either way, though, the 34-year-old Xabi will probably move on come summer, which means the Bavarians will need a new man in the midfield. Where better to poach a talented midfielder than from Borussia Monchengladbach, one of the only teams that was able to beat Bayern Munich all fall?

As for Xabi, there are other rumors swirling in the world of European football that the midfielder could exit Bayern Munich in January to make a return to Liverpool. Xabi, of course, played for the Reds from 2004 to 2009, helping the soccer club to UEFA Champions League and Super Cup victories along the way. He also tallied more goals with Liverpool (19) than with any other club, which might make Anfield a fitting place for him to close out his career.

A Move for Mane

Bayern Munich don't lack for great offensive players at the moment, with Robert Lewandowski and Thomas Muller occupying two of the top three scorer slots in the 2015 2016 Bundesliga. However, if the German soccer club does pick up a new forward this January, Southampton's Sadio Mane could be the man. Manchester United are also reportedly pursuing Mane, so there are no guarantees here. Regardless of what happens, though, the Senegal-born winger is bound to be a top prospect-either in January or next summer.

Any players that you're hoping to see don the Bayern Munich shirt? At Soccer Box, we want to hear your thoughts and predictions. Find us on social media to chat, we are active on Facebook, Instagram, Tumblr, and several other networks.