The 31-year-old is currently ranked 1,065 in men's singles ATP rankings.
Nick Kyrgios is currently suspended from tennis by the ATP.
In-form Olympic champion continued to narrow the gap on his old rival with victory at the Shanghai Masters.
Williams is currently ranked number 2 in the women's tennis rankings.
Kyrgios tamely conceded the match to qualifier Mischa Zverev.
Rafael Nadal had earlier slammed the move claiming it goes against the values of the sport.
The British no. 1 secured a comfortable 7-6 (7-1) 6-1 over Agut.
Murray faces Agut in the final of the Shanghai Masters. Find out where to watch live.
The Brit will play Bautista Agut in the final in Shanghai, after he beat the world number one.
Murray faces Simon in the semi-final of the Shanghai Masters. Find out where to watch live.
Djokovic faces Agut in the semi-final of the Shanghai Masters. Find out where to watch live.
Elsewhere, world number one Novak Djokovic came back from a set down to defeat qualifier Mischa Zverev.
Rafael Nadal's season has been hampered by injuries and loss of form.
Murray faces Goffin in the quarter-final of the Shanghai Masters. Find out where to watch live.
Djokovic faces Zverev in the quarter-final of the Shanghai Masters. Find out where to watch live.
Nick Kyrgios has also been fined by the ATP following his controversial performance against Mischa Zverev.
Wimbledon and Olympic champions sets up Lucas Pouille clash after 6-2 6-3 victory.
Kyrgios was previously accused of giving up against Richard Gasquet at Wimbledon in 2015.
Murray faces Johnson in the Shanghai Masters. Find out where to watch live in the UK.
Nadal faces Troicki in the Shanghai Masters. Find out where to watch live in the UK.
Stan Wawrinka faces Kyle Edmund in the Shanghai Masters. Find out where to watch live in the UK.
A Dutch journalist had previously obtained an image of similar instructions sheet and posted it online.
Novak Djokovic faces Fabio Fognini in the Shanghai Masters. Find out where to watch live.
'I am really excited to get back on the court for a great cause', says Sharapova.
British number one claims fifth title of 2016 with 6-4 7-6 victory in Beijing.
The world number three prevails 6-4 6-2 to claim second title in Beijing.
The Serb has struggled for form in recent times, suffering early exits in both 2016 Wimbledon and Olympics.
Radwanska faces Konta in the final of the China Open. Find out where to watch live.
Andy Murray faces Grigor Dimitrov in the final of the China Open. Find out where to watch live.
Murray sees off David Ferrer as Konta becomes first British top 10 player since 1984.