Karlovic finished his 25-year career with eight singles titles and a record of 371 wins, 346 losses and $10.1 million in prize money.
The No. 2-ranked Sabalenka blew a set and 2-0 lead as Donna Vekic of Croatia rallied to win 6-7 (5), 6-3, 6-0 in the second round.
Alcaraz was the defending champion but hasn’t looked as sharp and aggressive this week as he was a year ago.
Top-seeded Carlos Alcaraz advanced to the Argentina Open semifinals after beating Andrea Vavassori of Italy 7-6 (1), 6-1 on Friday.
The pair is “ending our professional partnership but will continue to remain close friends.”
The International Tennis Integrity Agency said it reached an agreement with Jenson Brooksby to reduce the ban from 18 months to 13 and backdate it to when his third missed test happened.
The combined ATP and WTA event is March 6-17 at Indian Wells Tennis Garden.
The former world No. 1 spent almost three full days in the hearing at the Court Arbitration for Sport in front of three judges now considering their verdict.
Djokovic to return to Indian Wells for 1st time in 5 years, joined by Nadal, Alcaraz, Swiatek, Osaka
Novak Djokovic won the tournament in 2008, 2011, 2014, 2015, and 2016.
Argentina reached the Davis Cup Finals group stage by eliminating Kazakhstan 3-2 in the best-of-five-match qualifying round.
Thiago Monteiro led Brazil to the Davis Cup Finals group stage in September, beating Sweden’s Elias Ymer 4-6, 6-4, 6-2.
Rajeev Ram and Austin Krajicek beat Illya Beloborodko and Oleksii Krutykh.
Chris Eubanks is from Atlanta and played college tennis at Wake Forest.
It all started when his parents left him alone at an early age to find his way while still teaching him a solid work ethic.
Jannik Sinner became the first Italian man to win a Grand Slam singles title in nearly a half century.
Jannik Sinner became the third Italian man to win a Grand Slam tennis singles title.
Aryna Sabalenka swept Zheng Qinwen in the Australian Open women’s singles final.