Serena Williams has survived an early scare to win her first round match at the Australian Open, while compatriot Sloane Stephens has been knocked out in the opening round.

After the recent signing of David Price by the Boston Red Sox, we look at the top five free agents still on the market.

  1. JASON HEYWARD – RF – ST. LOUIS

Depending on who you talk to, Jason Heyward could appear in a lot of places on this list.

His physical tools combined with his skill and age means there is still a chance he can become one of leagues' most dominant players, but the question marks over his game draw very warranted question marks.

Nonetheless, we have seen what Hayward can do both offensively and defensively in a ballpark, and as he's currently approaching his prime, he's sure to command one of those ridiculous contracts we're all to accustom to seeing MLB players receive.

The Chicago Cubs have been listed as just one of the suitors for his services.

  1. JUSTIN UPTON – LF – SAN DIEGO

The three-time all-star and two-time silver slugger is another five-tool player in this years' free agency class, and at 28, we can expect the best of Upton very soon.

Whilst he has failed to scale the heights the media set for him as “one of the best outfielders in the game”, he has still been predicted by many of those to earn around $150 million on the next contract he signs.

San Francisco are known admirers of Upton, but may struggle to fit him on an already crowded payroll.

  1. YOENIS CESPEDES – OF – METS

Yoenis Cespedes is the oldest of the three outfielders listed here, but is arguably the best option of the three – playing and value wise.

He may have bounced around a bit in his short MLB career, but he won the Golden Glove award this year, and was an all-star the year before, and his recent trip to the World Series only makes him a more valuable asset.

The Los Angeles Angels have been listed as his most likely destination, with the Chicago White Sox and Seattle Mariners also interested.

  1. CHRIS DAVIS – 1B – BALTIMORE

Baltimore first baseman Chris Davis is likely to find a new home this off-season, although the Orioles have made it well known they would like him to return.

For that to happen, the man known as ‘Crush' would have to give the O's a fairly sizable “hometown discount”, given that they would not be able to match a $150-175 million bid.

The Boston Red Sox have been mooted as a potential destination for Davis, which is understandable giving the impending departure of David Ortiz, but may not be keen to make the oft-made mistake of overpay on power.

  1. ZACK GREINKE – SP – DODGERS

Zach Greinke has always been the prize of this free-agent class, yet has always seemed like the least likely one to leave town on this list.

At 32, he still has plenty of baseball ahead of him, but coming off his best season yet, he was always likely to opt out of his contract with LA.

Greinke is expected to choose between re-signing with the Dodgers or moving north to San Francisco, but sources are confident the latter is the most likely outcome.