The Australian eased past South African Rik de Voest 6-3, 6-4 to reach the quarter-finals of the Hall of Fame Tennis Championships.
Haas, ranked 10th in the world and the 2004 champion here, converted five of 12 break points to defeat the 19-year-old Californian for the third straight time this season.
Defending champion Andy Murray survived a scare to reach the quarter-finals with a 6-0, 6-7, 6-4 win over Dane Kristian Pless.
Teenager Kei Nishikori became the first Japanese to reach an ATP final at the Delray Beach International.
Johanna Konta hopes fellow Briton Andy Murray will be in action at this year's Wimbledon despite media reports claiming that the Scot has suffered a setback in his recovery from hip surgery.
So Djokovic will certainly not be letting his guard slip when he plays American Denis Kudla on Friday.
The American teenager beat compatriot Paul Goldstein in the San Jose Open first round on Monday.
World No 1 Novak Djokovic and defending champion Andy Murray produced contrasting performances to secure their berths in the quarter-finals of the Madrid Masters on Thursday.
Donald Young has replaced the injured John Isner for the United States and will face Wimbledon champion Andy Murray of Britain in Friday's opening match of the first-round Davis Cup tie in San Diego.
Raducanu stormed into the third round of the Cincinnati Open
Defending champion Djokovic fired his 15th ace on match point to defeat Querrey but his serve had been an issue earlier in their second-round encounter.
The Swiss squandered seven set points in the opener and although he took the second on a tiebreak he capitulated in the decider after dropping serve at 1-2, losing 7-5, 6-7(3), 6-1.
'I would say winning the US Open has helped me for all these grand slams I have played so far, and I believe the rest of my career' 'It's great for me to hear that even he, and a lot of players around, even ex-players, when they were looking before the tournament started, that they were seeing me as a player that could go quite deep (into the tournament)'
Manchester City and Everton players took to the field wearing Ukrainian flags before their Premier League game on Saturday while there were anti-war messages at stadiums elsewhere following Russia's invasion of Ukraine.
Kevin Anderson spoiled the American party at the US Open when the big-serving South African beat local favourite Sam Querrey 7-6(5), 6-7(9), 6-3, 7-6(7) to reach his first Grand Slam semi-final on Tuesday.
Prakash Amritraj began his campaign at the Hall of Fame Tennis Championships with an easy straight sets win over Flavio Cipolla, in Newport.
Images from all the action on Day 5 of the Australian Open
World number one Novak Djokovic has disclosed that his sudden slump in form was due to ' private issues' and not because of a lingering wrist injury.
Wimbledon champion Andy Murray says he is unlikely to play in Britain's Davis Cup quarter-final clash in Serbia this weekend but could travel to Belgrade in support of the team.
Tenth-seeded Keys, who reached the third round with a 6-4, 6-3 victory over Luksika Kumkhum of Thailand, is one of the biggest servers on the women's circuit.
Sania and her Chinese Taipei partner Su-Wei Hsieh, seeded second, defeated the Argentine-Swiss combine of Maria Irigoyen and Romina Oprandi 6-2, 6-0 in 48 minutes, while tenth seeds Paes and Raven Klaasen of South Africa beat the American duo of Scott Lipsky and Rajeev Ram 6-4, 7-6(6).
Rafael Nadal continued to scythe his way through the Shanghai Masters on Thursday, reaching the quarter-finals with a 6-3, 6-1 thrashing of temperamental Italian Fabio Fognini.
Somdev Devvarman put up a strong fight before going down to world No 31 Fernando Verdasco, while Mahesh Bhupathi lost in the first round at the ATP China Open, in Beijing, on Thursday.
Leander Paes will kickstart his US Open campaign with Czech partner Radek Stepanek against Jarkko Nieminen of Finland and Dmitry Tursunov of Russia.
In last year's quarter-finals at the All England Club, Federer saved three match points before edging out Cilic in five sets and the closeness of that match is comforting for the Croat.
Wimbledon finalists Novak Djokovic and Roger Federer are on a semi-final collision course at the US Open after they were placed in the same half of the draw.
Seven-time champion Federer faces last year's runner-up Milos Raonic in his quarter-final on Wednesday after defending champion Murray, who is chasing a third SW19 title, takes on big-serving American Sam Querrey for a place in the last four.
Andy Murray overcame a slow start and a third set service break to beat Taro Daniel 1-6, 6-2, 6-4 in the first round of Indian Wells on Friday and notch his 700th career win.
Here is a timeline of Djokovic's decline since the last of his 12 Grand Slam titles.
Cilic marches past Querrey into Queen's semis
Top seed Kei Nishikori of Japan became the first player to win three consecutive Memphis Open tennis tournament titles when he prevailed in straight sets on Sunday.
Goffin's 6-3, 6-3, 6-2 triumph in front of a boisterous home crowd gave Belgium a 3-1 lead and sent them into a home semi-final against Australia who also wrapped up victory over the United States thanks to Nick Kyrgios's defeat of Sam Querrey.
The Wimbledon Championship runner-up is expected to be a top draw at the ATP 250 event to be played at the Mhalunge Balewadi Stadium in Pune.
Top seed Kei Nishikori is on track for a three-peat at the Memphis Open after a narrow semi-final victory on Saturday.
Stan Wawrinka outlasted Frances Tiafoe over three sets to set up an all-home quarter-final against compatriot and fellow veteran Roger Federer at the Swiss Indoors on Thursday. The 34-year-old Waewrinka, who won 6-3, 3-6, 7-5, will attempt to beat Federer for only the fourth time when they meet for their 27th clash on Friday in a dream tie for the Basel crowd.
World No 5 Roger Federer's possible records aside, it is the first time since 2003 that the semis have featured four men outside the top four in the world rankings.
The French flag flew proudly in Montreal on Monday as Gilles Simon and Gael Monfils advanced to the second round of the Rogers Cup.
A summary of Monday's action at the US Open.
News of all that's transpired on and off the tennis courts
'This will be my first trip to Eastbourne, I have heard great things about the tournament'