Five storylines to keep an eye on this week as play begins at the All England Club:

Djokovic bids to keep Calendar Grand Slam alive.

Fresh off his first career French Open title, Novak Djokovic now has his eyes on another milestone: the calendar Grand Slam. The feat has only been done three times by a men’s player, Don Budge in 1938 and Rod Laver in 1962 and 1969. Djokovic is already the current champion of all four majors and is the clear favourite at Wimbledon this year. The world No. 1 is also the two-time defending champion and looking for his 13th Grand Slam, which would put him just four back of Roger Federer’s career total of 17.  Federer just so happened to be drawn in Djokovic’s half which sets up a potentially tasty semi-final. Can anyone deny the unstoppable force that is Novak Djokovic?

Can Serena Williams win her first Grand Slam in a year?

Since winning Wimbledon last year, Serena has lost in the semi-finals at the U.S. Open, lost in the final at the Australian Open and was also defeated in the final at Roland Garros. Is there cause for concern? Absolutely. Going four straight Grand Slams without a major title is something Serena hasn’t done since 2011-12. That has fans wondering if she will ever tie Steffi Graf’s career Grand Slam record of 22 titles. Serena is still going deep in tournaments, not being eliminated in the earlier rounds like years past, so she hasn’t necessarily lost a step. The 21-time Grand Slam singles champion does have a tricky draw early on where she could face 31st seed Kristina Mladenovic, who gave her a tough fight at Roland Garros and is an excellent grass player.

Can McEnroe guide Milos to his first Grand Slam final?

Milos Raonic wanted an X-factor for Wimbledon, and he got that in John McEnroe. The three-time Wimbledon champion joined the Raonic team as a consultant for the grass season. That partnership quickly paid off with Raonic making the final at Queen’s Club, where he lost to Andy Murray. In that match, Raonic was in complete control, up a set and a break, until the wheels fell off in the second set and he ultimately lost in three. It was a disappointing end to a great run for Raonic at the Wimbledon tuneup. Now he’ll be looking to at least match his 2014 result, which saw him make his first career Grand Slam semi-final. McEnroe can help Raonic with his play at the net, but he also mentioned in a conference call earlier this week that he can help Raonic “express himself more positively.” McEnroe didn’t do much smiling during his career on court, but since retiring it’s been all positives. That’s where his experiences can help the Canadian. The one letdown that came for Raonic when the draw came out was that he was placed in Djokovic’s quarter of the draw. The Serbian owns a 7-0 record against him.

Can Bouchard rediscover her Wimbledon magic?

While 2016 has been a rebound year for Eugenie Bouchard she is still far from the form she showed two years ago. Her Grand Slam results this year have been mediocre, with two second-round exits at both the Australian Open and Roland Garros. The return of Coach Nick Saviano is supposed to be the catalyst for Bouchard’s resurgence, but so far the results have been mixed in the grass season. A first-round loss at the Ricoh Open to World No. 171 Elise Mertens was an unexpected result, which was followed by a second-round loss in Mallorca to world No. 82 Anastasija Sevastova. With two early exits, Bouchard played a third tournament at Eastbourne, which saw her win two matches before bowing out to World No. 3 Agnieszka Radwanska. Bouchard was also defeated by Radwanska at the Australian Open in the second round, along with world No. 9 Timea Bacsinszky at Roland Garros also in the second round, so the draws have not been kind to her. At Wimbledon, Bouchard will face unseeded Magdalena Rybarikova in the first round. Bouchard has a 1-0 career record against Rybarikova, and if victorious, she could face British favourite and No. 15 seed Johanna Konta. Konta had an amazing run earlier this year at the Australian Open where she made the semi-finals, which was her breakthrough tournament. It’s not a favourable draw, but it could have been much worse for the Canadian. Expect Bouchard to be fresh and ready to have her best Grand Slam result of the year.

Is this Federer’s last chance at winning another Grand Slam?

The 2016 season has been unfamiliar territory for Roger Federer. His 65 consecutive Grand Slam appearances streak came to an end at Roland Garros due to knee and back injuries. Nearing 35 years of age, Federer has reached the twilight of his career but still is one of the best players in the world. Since returning from injury, Federer failed to reach the final in both tournaments played, losing to young stars Dominic Thiem and Alexander Zverev.  In fact, Federer has yet to win a title all season. It will be even more difficult at Wimbledon as Federer was placed into Djokovic’s half of the draw. Federer has lost his last four matches played at Grand Slams against Djokovic, but the last time he was able to beat him just happened to be at Wimbledon in 2012. Grass is Federer’s best surface, so if he is ever to win an 18th Grand Slam title, it would be expected to be at Wimbledon, an event he has won at seven times.