( CNN ) -- World number one Novak Djokovic began his bid to win a second Wimbledon title with a straight sets victory as he focused hard on avoiding a shock Rafael Nadal-style defeat . A day after the Spaniard bowed out against Belgian world No . 135 Steve Darcis , the Serb was in unforgiving mood as he defeated Germany 's Florian Mayer 6-3 7-5 6-4 . Djokovic was playing his first match since losing a thrilling five-set semifinal at the French Open against Nadal , who went on to win the tournament for a record eighth time . `` I watched the bigger part of ( the Nadal-Darcis ) match and I thought that his opponent played great , '' Djokovic said . `` Darcis came up with some incredible shots , incredible points in important moments and he deserved to win . `` I know people expect all the top players to get to at least the final stages of a grand slam or whatever tournament they play . It was a surprise in the end him losing to Darcis , but his opponent played great . '' Having been seeded in the opposite section of the draw , Djokovic would have been unable to meet Nadal until the final itself but now his main rivals would appear to be either Wimbledon maestro Roger Federer , the defending champion , or local favorite Andy Murray . Yet Djokovic is refusing to look so far ahead as he says the early rounds of grand slams can be very testing for the world 's leading players . `` You can not take anything or anybody for granted . You have to be grateful for being in this position and work even harder to stay there , '' said the 2011 Wimbledon champion . `` The sport is evolving , like everything in life . Everybody is getting better , getting more professional . `` Especially at the opening stages of grand slams , there are a lot of quality players who have nothing to lose really coming on the Center Court or Court One , playing in front of 10,000 or more people . `` Against one of the top players , what can you really lose ? You 're going and you 're playing your best tennis . '' Djokovic had taken a risk ahead of the championships by failing to play any competitive matches on grass but he gave a convincing display against a player whose game , the Serb says , is `` suited to grass '' . Bidding for a seventh grand slam , Djokovic will now meet American Bobby Reynolds in the second round . The Serb is in the same half of the draw as David Ferrer , the Spanish fourth seed who lost his first grand slam final to Nadal last month . A master of clay , Ferrer had to adapt to the Wimbledon surface as he beat Wimbledon debutant Martin Alund of Argentina in four sets . `` It is difficult to play on grass for my game , '' said Ferrer . `` It is very difficult to defend . I am happy because I am in the second round but I know that I have to improve my game . '' In other matches on Tuesday , seven seed Tomas Berdych eased through in straight sets against Martin Klizan in what is the Czech 's 40th straight appearance at a grand slam . Germany 's Tommy Haas , a quarterfinalist at Roland Garros , overcame Dmitry Tursunov while Juan Martin del Potro beat Albert Ramos in straight sets . Elsewhere , Australia 's Bernard Tomic defeated American 21st seed Sam Querrey before making an impassioned plea for his controversial father to be allowed entry to Wimbledon . Tomic 's father has been barred from attending by Wimbledon authorities after an incident involving his son 's doubles partner Thomas Drouet in May , with security guards having been told to deny John Tomic entry even if he buys a ticket . Bernard wants Wimbledon and the Association of Tennis Professionals ( ATP ) to overturn the suspension imposed after John was accused of headbutting Drouet on the streets of Madrid . The ban is ongoing at all ATP events until the case reaches its conclusion , with Tomic set to face a Madrid court in October , and his 20-year-old son is now missing both his father and coach . `` All of a sudden not to have someone there who 's been there for you your whole life is very difficult . It 's not a good feeling . It 's tough , '' said Bernard , whose father is staying with him in south London . `` I 'll try and have a word with ( the Wimbledon authorities ) . I know they are very strict here . We 'll see what they say . It would be amazing to have my dad here watching me as a coach and a father . '' John Tomic has claimed self-defense for his actions .
World number one Djokovic beats Germany 's Florian Mayer in straight sets . Tomas Berdych and Martin del Porto also comfortably through . Bernard Tomic makes plea for controversial father John to be allowed Wimbledon entry .