You can't help but admire Lionel Messi.

The Argentine forward is regarded as one of the best players of all time.

He made his professional debut in 2004 and since then he has shattered record after record.

One of his most impressive records was achieved in 2012.

Messi was almost unstoppable that year. In total he made 69 appearances and scored a ridiculous 91 times.

That shattered Gerd Muller's record of 85 goals in a calendar year, which was set in 1972 and lasted for 40 years.

After breaking the record, Messi decided to send one of his match shirt's to the Bayern legend as a gesture of goodwill.

He accompanied the message by writing: "For Gerd Müller / My respect and admiration / A hug, Leo."

Although it would have been one of his prized possessions, Muller decided to send the shirt to his former club so it can be on show in the Allianz Arena.

And Bayern obliged, meaning the shirt is now the only non-Bayern related piece of football history in the club museum.

You can view the shirt on display in the Allianz Arena below:

The shirt is also presented alongside a message from former Barca president Sandro Rossell to Bayern chief Karl-Heinz Rummenigge.

Rossell, who was president of the club for five years between 2010-2014, wrote: "In recognition of the player and person that is Gerd Muller.

"The esteem and admiration our club feels for Bayern and it's fans is demonstrated once again in the historical tie between these two great players who have become sporting legends of our clubs."