Jannik Sinner reclaimed world number one status after winning the Monte-Carlo Masters on Sunday.
Sinner defeated Carlos Alcaraz in straight sets to secure a maiden title at the clay-court event, winning 7-6, 6-3.
The Italian not only picked up his fourth-straight ATP Masters 1000 crown, but finally recaptured the top spot in the rankings after five months.
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Sinner will begin his third reign after winning the Monte Carlo Masters…
Alcaraz became the number one after winning the US Open in September, and briefly lost the position for a week in November, but has reigned since then.
Recently, the Spaniard equalled Sinner‘s tally of weeks at number one, but the Monte-Carlo champion has now taken the lead again on that front.
Jannik Sinner surpasses Carlos Alcaraz in weeks at number one
Sinner’s weeks at number one total increased to 67 after the triumph, which ranks second this decade.
Since the beginning of 2020, only Novak Djokovic has spent more weeks at number one than Sinner, with a tally of 153.
Trailing the Serb is Sinner, Alcaraz on 66, Daniil Medvedev on 16 and Rafael Nadal, who spent just four weeks at the top of the rankings this decade.
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Alcaraz has the chance to become the world number one again very soon, however, should he win the upcoming Barcelona Open.
He made the final in Barcelona last year, and is defending 330 points, but can leapfrog Sinner once more if he goes all the way.
From now until the end of the clay season at Roland Garros, Alcaraz has 3,330 points to defend, while Sinner is protecting just 1,950.
Players with the most weeks as world number one all-time
Both Alcaraz and Sinner are beginning to close in on the top ten all-time for most weeks at world number one.
With totals of 67 and 66, Sinner and Alcaraz rank 12th and 13th, respectively, with the two having already surpassed the likes of Andy Murray, Gustavo Kuerten and Jim Courier.
Djokovic has the outright most weeks at number one with 428, followed by Roger Federer, Pete Sampras and Ivan Lendl.
| Number | Player | Total weeks at number one |
| 1 | Novak Djokovic | 428 |
| 2 | Roger Federer | 310 |
| 3 | Pete Sampras | 286 |
| 4 | Ivan Lendl | 270 |
| 5 | Jimmy Connors | 268 |
| 6 | Rafael Nadal | 209 |
| 7 | John McEnroe | 170 |
| 8 | Bjorn Borg | 109 |
| 9 | Andre Agassi | 101 |
| 10 | Lleyton Hewitt | 80 |
| 11 | Stefan Edberg | 72 |
| 12 | Jannik Sinner | 67 |
| 13 | Carlos Alcaraz | 66 |
In terms of most consecutive weeks at world number one, Federer leads the all-time list with 237.
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