The first goal from Xhaka is fantastic and can be a best goal in Xhaka's career. It opened the match for Leverkusen but later they let Mainz equalized the match and even faced with a second conceded goal by a mistake from their defenders.
Leverkusen luckily got a second goal by a bad save from Mainz's goalkeeper and got three points. Generally in this match Leverkusen did not create enough pressure on Mainz and did not have many opportunities to find goals.
After all challenges from Mainz, Leverkusen ended the match very well with a maximum 3 points and made a new record for German football with 33 unbeatable matches.
I have to say those 2 goals were really classy has accuracy and power so it failed to be anticipated by the goalkeeper, this victory will strengthen Leverkusen's position at the top of the standings and still holds an undefeated record. Will Leverkusen write new history as a team that has never been defeated in the Bundesliga and won the title? I've checked it over the last 9 seasons and no other team in the Bundesliga can do it so if Leverkusen can do that then they will make new history. Xabi Alonso as a coach certainly gets a lot of praise and a reputation as a top coach.