The world number one is hoping to match Bjorn Borg's record of five successive Wimbledon titles.
He beat Haas on Saturday to move within one win of equalling Bjorn Borg's record for consecutive victories on grass.
The Spaniard became the first man since Bjorn Borg to win three successive titles at Roland Garros.
Roger Federer reached a record eighth consecutive Grand Slam final by overcoming Nikolay Davydenko 7-5, 7-6, 7-6.
Rafael Nadal beat fellow Spaniard Carlos Moya to enter the French Open semi-finals.
The Australian said he saw nothing to change his opinion that the Spaniard is untouchable at Roland Garros.
The Spaniard plays Juan Martin del Potro of Argentina in the first round on Tuesday.
World No 1 Novak Djokovic beat defending champion Andy Murray 6-2, 3-6, 6-3 in the Madrid Open final on Sunday to capture a record 29th Masters crown.
Teenager Andy Murray, the last player to beat Roger Federer, is in awe of the records piled up by the dominant Swiss.
No wonder Roger Federer wishes he could jump into a time machine and go back through the years to have a shot at Rod Laver or Bjorn Borg.
Defending champion Roger Federer beat Chile's Fernando Gonzalez 7-6, 6-4, 6-4 in the Australian Open final.
The following factbox details five times a Video Assistant Referee (VAR) made an impact at the World Cup.
Tim Henman beat Roger Federer the last time they met at Wimbeldon, in 2001 after the Swiss eliminated Pete Sampras
The pairings were announced at Thursday's opening ceremony in bright, late afternoon sunshine at the course just outside Paris as France proudly hosts the event for the first time.
The Wimbledon champion will begin his defence against the talented Richard Gasquet of France
Jeev Milkha Singh's finished tied 25 at the Volvo Masters in Spain.
The tennis legend will part with his five replica Wimbledon trophies and the two tennis racquets he used during the 1976 and 1980 finals.
The Indian ace and Samantha Stosur later crashed out of the mixed doubles, losing in the first round.
Factbox on Rafael Nadal, who beat Dominic Thiem 6-4, 6-3, 6-2 to win his 11th French Open title on Sunday:
Wimbledon endured its soggiest start since 1991 on Monday with no matches completed on the first day because of rain.
Rishabh Pant's form would be an important sub-plot when India look to seize the advantage against South Africa
The Spaniard, who has won 88 of his last 89 matches on clay, feels he still has plenty of room for improvement.
Roger Federer beat Tomas Berdych in the final in Halle to equal Bjorn Borg's record of 41 wins on the trot on grass
Roger Federer edged out France's Richard Gasquet 7-6, 6-7, 6-4 to reach the quarter-finals of Halle International
Rafael Nadal outmuscled Tommy Robredo for his 47th consecutive claycourt victory.
Rafael Nadal extended his winning streak on clay to 46 after he edged out fellow Spaniard Nicolas Almagro at the Barcelona Open.
Rafael Nadal started his defence of the Barcelona Open with a 6-4, 6-2 win over Feliciano Lopez.
List of US Open men's singles champions since the Open Era began in 1968:
Bjorn Borg was to put the items up for sale for long-term financial security
The American is attempting to put together a consortium to buy Bjorn Borg's five replica Wimbledon trophies.