Did Federer decline in 2011?

Why did Federer stop winning in 2011? And how did he win three more slams in 2017 and 2018?

Music:
"Video Magic (Daniel Solar Remix)" by Sorcerer
"Crazy" by Patrick Patrikios
"Know Myself" by Patrick Patrikios

Get Video Magic(Daniel Solar Remix) by Sorcerer here https://t.lickd.co/936488d3ec3b4f4880...

License ID: A7e5bg2pw0y

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