US
Ruling comes after David Goffin said fan spat gum at him
World number one beats French wildcard 6-4, 7-6 (7/3), 6-4
The 14-time champion slumped to a straight-sets defeat to Alexander Zverev in the first round
This year's event was expected to be the 14-time champion's farewell to Roland Garros
Briton loses in straight sets to 39-year-old Swiss
He admits that he hasn't been playing good at all this year
The world number one could also become the first player to lift three successive women's titles
He has only played 15 matches since January last year due to injuries
I need to improve drastically to win a fourth French Open trophy, says the Serb
The tournament will take place from 26 May at Roland Garros