Daniil Medvedev won the Marseille ATP tournament on Sunday.
Thanks to his first title of this year, the Russian climbs to second place in the world rankings on Monday.
Medvedev will be the first player in more than fifteen years outside 'The Big Four' (Roger Federer, Rafael Nadal, Novak Djokovic and Andy Murray) to occupy second place on the ATP ranking.
Lleyton Hewitt was the last to achieve this on July 24, 2005.
The 25-year-old Medvedev takes over from Rafael Nadal, who withdrew from the ABN AMRO World Tennis Tournament in Rotterdam and the tournaments in Acapulco and Dubai due to a back injury.
In Marseille, Medvedev was too strong for the Frenchman Pierre-Hugues Herbert in the final 6-4, 6-7 (4) and 6-4.
The Russian, who lost the final battle of the Australian Open to Djokovic in February, booked his seventeenth tournament victory on the ATP Tour.
On Monday's world ranking, Medvedev Djokovic still has to tolerate well ahead.
The global number one has more than two thousand points more.
Nadal drops to third place just over two hundred points behind Medvedev.
Dominic Thiem remains number four and Federer will take sixth place.