But she failed to fully rediscover her rhythm and quickly dropped the first set 6-2 to the Latvian Ostapenko, the French Open champion.
World No 7 Ostapenko, who enjoyed a superb 2017 season that included winning her first grand slam title at the French Open at Roland Garros, said it was unbelievable to play Williams. The American great was back on court on Saturday night for her first match after an nearly one-year break - but it was not the result she was hoping for. "But it's really good", she said in her on-court interview.
"I don't know, but I am definitely looking forward to getting back out there". This was such a good time for me.
"To do well here would be an wonderful feeling but I'm not going to weigh my whole year and rest of career on the next three, four weeks", she said.
Williams also has more grand slam singles titles - 23 - than the age of her rival Saturday, Ostapenko. The younger Williams who has 72-career titles has been top of the Women's rankings for 319 weeks and posted her fifth consecutive top-three finish previous year having won at Wimbledon and Rome.
Brian Lott, Chief Communications Officer of Mubadala, the title sponsor of the tournament, added, "For the tennis fans in the UAE, having Serena here as part of the Mubadala World Tennis Championship weekend is a thrilling opportunity to see even more world-class tennis".
Williams again struggled with her serve in the second set.
In the super tiebreaker, Ostapenko raced to an 8-2 lead before halting a brief recovery by Williams. "I have had a tough few months and I am just excited to be able to play again".
"It is dubbed an "exhibition", but the tennis this week in Abu Dhabi is great - it is very competitive and everyone is going to give it their all".
"We all know what Djokovic is capable of", said Austria's Thiem who is also playing in the six-man Abu Dhabi field. The 14th-ranked Anderson immediately broke Bautista Agut and was never in danger of losing serve in the first set.
Deputy Buglione explained the homeowners brought chili and corn muffins to the deputies and Secret Service agents who were posted. Aspen is the county seat of Pitkin, where Hillary Clinton defeated Trump by a significant margin: 69.7 percent to 24.3 percent.
There are those unexpected feelings and the most fantastic feeling of all was to have the title of World Champion again. In his own inimitable style, Kasparov slammed Anand's detractors, especially those who say that he should retire.
Then at 1.5am (AEDT), he popped up again with a tweet showing a cartoon of Santa making a Wikileaks "good or bad" list. Several users said Assange deleted his account, but some thought the account was suspended by Twitter.
Right now, World Health Organization authorities said there is only a clinical description and no prevention or treatment options. This means that health care workers and doctors will be able to diagnose someone with the condition.
The pilot assured the Air Traffic Control that he had the situation under control immediately after the shaky landing. Winter Storm Ethan dumped at least three inches of snow on Boston, which saw its first White Christmas in 14 years.
Van Dijk in action for Southampton against Liverpool earlier this season. " 12 million to Southampton [was] a snip at the time! ". The Dutch global centre-back was close to joining Liverpool before the English Premier League season started in August.
LG V30 To Welcome New Year With Oreo
Amidst the many devices that are receiving Oreo updates, we now have the Moto X4 (Android One edition) joining the ranks. Oreo update will be a major update of the OnePlus 5T smartphone and it will make your device run smoothly.
Police officers killed in shooting outside Egypt church
The group's North Sinai affiliate had killed at least seven Coptic Christians in the restive peninsula in less than a month. The attack began when the gunman tried to break through the security cordon outside the Coptic Church of Mar Mina.