Here is a timeline of Djokovic’s decline since the last of his 12 Grand Slam titles

Early Wimbledon exit 2016

Serb star Djokovic arrived at Wimbledon fielding questions about the possible calendar-year slam but suffered a third-round exit to American Sam Querrey .

Rio Olympics disappointment

Top seed Djokovic was reduced to tears after suffering a shock first-round loss to Argentina’s Juan Martin del Potro — describing it as one of the toughest losses of his life.

Beaten by Stan in 2016

Defending champion Djokovic had enjoyed a lucky run to the final with one walkover and two opponents retiring hurt, but he suffered physically as Stan beat him in four sets.

NO 1 ranking under threat

Djokovic’s No 1 ranking is under threat from Andy Murray. Djokovic loses to Roberto Bautista Agut in the Shanghai semifinals and then falls to Cilic in the quarterfinals in Paris.

Lame exit at French Open

Despite having announced he was working with fomer star Andre Agassi, Djokovic was crushed by Dominic Thiem in the quarterfinals — losing the third set 6-0.

Shock defeat at Australian Open

Denis Istomin beat Djokovic in the second round of the grand slam he had all but dominated for the past seven years. It was Djokovic’s earliest grand slam exit since 2008.

Wimbledon woes continue

Djokovic won the Eastbourne grasscourt title — only his second of the year — but retired in the quarterfinals at Wimbledon against Tomas Berdych, citing an elbow injury.