‘Mrs Williams’ holds court in familiar style

Now that she’s ‘‘Mrs Williams,’’ per the Wimbledon chair umpire, now that she’s a mother, now that she is back on tour, Serena Williams is ready to rediscover her full complement of shots and full ability to dominate.

‘‘Not only do I expect to win,’’ she said yesterday after picking up a victory in her first match at the All England Club in two years, ‘‘I expect to win emphatically.’’

Williams found herself in a bit of a jam against 105th-ranked Arantxa Rus of the Netherlands, down by a break in the second set on a windy afternoon. And then, a five-game run and 25 minutes later, Williams had completed the 7-5 6-3 result.

‘‘I have such high expectations of myself,’’ said Williams, whose 23 grand slam singles championships include seven at Wimbledon, so she was seeded 25th even though her ranking is 181st following an extended absence. ‘‘I don’t go out there expecting to ‘do well’ or ‘see what happens.’ That’s just not me.’’

Day one at the grasscourt tournament featured mild surprises, such as US Open champion and French Open runner-up Sloane Stephens’ third firstround exit in the past five majors, and losses by No 5 Elina Svitolina and No 6 Grigor Dimitrov (to threetime major champion Stan Wawrinka).

Also drawing attention was eight-time Wimbledon champion Roger Federer’s new clothing sponsorship, during his easy-as-can-be victory at Centre Court.

Nothing feels as significant in tennis today, though, as what Williams does – because of what she’s accomplished in the past and because of what she’s trying to accomplish in the present, with a baby in tow. Not that she’s unique: Other mothers who won included 57th-ranked Tatjana Maria of Germany, who beat Svitolina 7-6 (3) 4-6 6-1; former No 1 and two-time Australian Open champion Victoria Azarenka of Belarus and 120th-ranked qualifier Evgeniya Rodina of Russia.

‘‘The tougher balance, for me, is to be able to spend time away from my son and be OK with taking, sometimes, time for myself, which is a struggle sometimes, because I really want to spend every second with him,’’ said Azarenka, who faces No 7 seed Karolina Pliskova next.

Williams has won 15 matches in a row at Wimbledon, a streak that encompasses titles in 2015 and 2016. The 36-year-old American sat out the tournament last year while pregnant; she gave birth to a daughter in September and married Reddit cofounder Alexis Ohanian in November (hence the change from ‘‘Miss Williams’’ over the arena microphone).

This is only Williams’ second major tournament in nearly 11⁄2 years, having returned at the French Open in May, where she won three matches before withdrawing with an injured pectoral muscle.