Possibly the signing of the summer. If Mesut Ozil was a shock capture last season then Sanchez's move from Barcelona will have Gunners fans the world over licking their lips. Sanchez was sensational for Chile in the World Cup playing in a center forward role, but traditionally terrorizes defenses on the wing. We'll see if his talents translate well in the Premier League this season.
Getty ImagesMichael Regan
Manchester United signed Herrera from Athletic Bilbao for a reported $48 million and he will give the midfield the energy they lacked last season. A box-to-box man who is not afraid of sticking his foot in, the Spanish playmaker will be key in Louis van Gaal's plans at Old Trafford.
Man Utd via Getty ImagesMatthew Peters
Jose Mourinho described Fabregas as the "missing piece" in his Chelsea midfield and it's hard to argue with that comment. Many expected him to return to Arsenal once it became apparent that Barceloaa were willing to sell, but the Blues were the club to benefit. Dynamic with a great eye for a pass and the back of the net, Fabregas will be a key player for Chelsea's title charge.
Bongarts/Getty ImagesMartin Stoever
Jose Mourinho reckons his Chelsea squad have been surprised by Costa's quality during preseason following his high-profile move from Atletico Madrid. Forget Costa's lackluster displays at the World Cup where he didn't look fit, his strength and movement should bring him the goals the Blues will need to be genuine title contenders during the 2014-15 campaign.
VI-Images via Getty ImagesVI-Images
The loss of Luis Suarez to Barcelona will place a heavy burden on the shoulders on the England forward, who may be forced to plough a lone furrow this season. The striker scored 25 goals last season and it might be too much to expect him to repeat the trick again without the assistance of Suarez in attack.
Getty ImagesMike Stobe
Lamela's first season at Tottenham was marked by injury and performances that suggested he is not up to playing in the Premier League. But now with fellow Argentine Mauricio Pochettino at the helm the skies are looking brighter. Lamela has looked sharp in preseason and has started to score the goals that persuaded Andre Villas-Boas to sign him from Roma.
Getty ImagesBrian Kersey
Bony may not be a Swansea player by the end of August. If his 2013-14 performances are anything to go by, it will be another stellar year for Ivorian hitman. He scored 25 goals last season and has been a success at every club he has been at (Vitesse and Sparta Prague). Expect big things from Bony in the Premier League this season.
Getty ImagesMichael Steele
Many suspect that Chelsea made a mistake in selling Lukaku to Everton -- and they may have a point. The Belgium striker scored five more goals than Fernando Torres from less appearances but never saw eye to eye with club boss Jose Mourinho. At a club-record £28million, much will be expected of Lukaku, whose strength in the air and sharp-shooting instinct should easily bring him close to 20 goals this season.
AFP/Getty ImagesPAUL ELLIS
Lallana was sensational in Southampton's incredible 2013-14 season which saw them finish in eighth -- one place behind Manchester United. Lallana's skill will excite Liverpool fans reeling from the loss of Luis Suarez. A player with great balance who makes the ball stick to his feet, Lallana scored ten goals from Southampton's midfield and could bag more with better players around him.
Liverpool FC via Getty ImagesAndrew Powell
Last season was a virtual write-off for the former Fiorentina striker but the signs are encouraging that this could be his year. Jovetic has looked strong in preseason and has been banging in the goals. With Alvaro Negredo and Sergio Aguero struggling to reach full fitness, Jovetic will be given more game time by Manuel Pellegrini to prove his undoubted ability.