Novak Djokovic will renew his love-hate relationship with Roland Garros knowing that it is himself rather than unsettled 12-time champion Rafael Nadal who could pose the greatest threat to winning an 18th Grand Slam crown.
The only man to beat Djokovic in 2020 is Djokovic after the Serb's hair-trigger temper prompted a sensational disqualification from the US Open.
The 33-year-old arrives in the French capital with a 31-1 record this year after his New York meltdown was followed by a record 36th Masters title in Rome.
Djokovic's 2016 triumph at Roland Garros allowed him to become only the third man after Don Budge and Rod Laver to hold all four Grand Slams at the same time.
Not even Nadal, the holder of 19 majors, or Roger Federer, with a record 20 Slams, can match that staggering achievement.
Federer will miss the French Open as he recovers from his injured knee while Nadal has played just three matches since February, a rustiness evident in his quarter-final exit in Rome.
However, Djokovic refused to get carried away by his chances at Roland Garros ahead of Sunday's start in a wet and chilly Paris.
"It's Nadal," insisted the world No 1 when pushed on who is the favourite. "You just can't put anybody in front of him."
Djokovic is right to be cautious after experiencing numerous low points on the red clay of Paris.
In the 2012 final against Nadal, having won eight games in a row, he was up a break and pushing to level the match at two sets apiece when rain brought an overnight suspension.
Play resumed the following day but Djokovic's momentum was lost and a double-fault on championship point completed his misery.
Twelve months later, Djokovic was poised for a semi-final win over Nadal with just a routine put away required to help give him a 5-3 final set lead and a chance to serve for the match.
However, he chose a smash rather than a soothing touch. He tumbled into the net, losing the point and Nadal pounced to eventually take the tie after four hours and 37 minutes.
When Djokovic loses his cool
In 2018, he lost a quarter-final to world No 72 Marco Cecchinato while last year he was beaten in the semi-finals by Dominic Thiem.
That match took two days to complete, featured numerous rain stoppages and winds so strong that a courtside umbrella was sent flying across court.
Djokovic will start his tournament against Sweden's Mikael Ymer, the world No 80.
Nadal, who skipped the defence of his US Open title due to fears over coronavirus, eyes a 13th French Open.
Since his title-winning debut in 2005, the Spaniard has only lost twice at Roland Garros in 95 matches – to Robin Soderling in 2009 and Djokovic in 2015.
The 34-year-old Spaniard may appear to be under prepared after his last-eight exit in Rome to Diego Schwartzman.
However, the last time he suffered such an early departure from the Italian capital was in 2017 – just weeks later he was lifting a 10th French Open without dropping a set.
Nadal cut an unsettled figure at a pre-tournament press conference where he admitted the cold and damp conditions forced him to face his "most difficult ever Roland Garros".
He is also unhappy about using a new brand of ball.
"For the health of the players, the ball is super heavy and becomes dangerous for the elbow and for the shoulders," he said.
Nadal begins his campaign against Egor Gerasimov, the 83rd-ranked Belarusian.
The unusual sight of Roland Garros being played in the autumn also means radically different conditions to those expected in its normal time slot of May and June.
That could suit newly-crowned US Open winner Thiem who has lost the last two finals to Nadal in Paris.
The world No 3 has 17 career titles with 10 of those on clay. Four of his five wins over Nadal have come on clay with three of four victories against Djokovic carved out on the sport's most testing surface.
This year, Thiem will be in the same half of the draw as Nadal and starts against Marin Cilic, the 2014 US Open winner and a former world No 3.
World No 5 Daniil Medvedev has yet to win a match at the tournament in three visits while sixth-ranked Stefanos Tsitsipas made the last 16 in 2019, losing a five-set marathon to 2015 champion Stan Wawrinka.
Wawrinka faces fellow three-time major winner Andy Murray in the first round on Sunday in a rematch of their 2017 semi-final epic, a tie which Murray described as the clash which "ended his hip".