It looks like Leverkusen only needs 4 more wins to lock up the title because there are only 7 games remaining in this season and the point difference between Leverkusen and Bayern Munich is 13 points, where 4 more games will make Leverkusen champions.
~snip~
A fantastic record for Leverkusen, at the moment they look perfect. History will create a Bundesliga champion without defeat. In addition, the good news is that Leverkusen will not lose Xabi Alonso. Xabi said he would remain at Leverkusen next season. This means he has the opportunity to defend his players and the championship title for the following season. Although I think it will be more difficult, because they have more fixtures and pressure from other clubs.