Argentinian eighth seed Juan Martin del Potro, who missed the French Open through illness, saw off Spain's Albert Ramos 6-2, 7-5, 6-1.
Top seed and world number one Novak Djokovic moved into the Wimbledon second round with a 6-3, 7-5, 6-4 win over Germany's Florian Mayer.
David Ferrer fought back to beat Argentina's Martin Alund, 6-1, 4-6, 7-5, 6-2. Ferrer will face Horacio Zeballos, also of Argentina, for a place in the last 32.
World number one Serena Williams racked up a 32nd successive win and will face France's Caroline Garcia for a place in the last 32.
Laura Robson stunned Russian 10th seed Maria Kirilenko, who was last year's quarter-finalist with a straight sets win.
Last year's runner-up and fourth seed Agnieszka Radwanska dispatched Austrian qualifier Yvonne Meusberger 6-1, 6-1 to set up second round clash with Mathilde Johansson of France.
Li Na, the Chinese sixth seed, enjoyed a comprehensive 6-1, 6-1 win over Dutchwoman Michaella Krajicek.
Bernard Tomic overcame exhaustion and dizziness for a grueling first-round win - 7-6 (8), 7-6 (3), 3-6, 2-6, 6-3 - over 21st-seeded American Sam Querrey.
© Copyright NDTV Convergence Limited 2016. All rights reserved.
Site and Data Powered by Sportz Interactive .