Costa is in exile in Brazil after falling out with Blues boss Conte during the close-season when the Italian sent the forward a text message that made it clear he was no longer part of his plans.
The 21-year-old, who was a pivotal member of the side that reached the Europa League final only to lose to Manchester United, signed a six-year contract with last season`s Premier League runners-up.
A van driver deliberately drove into people on the famous Las Ramblas boulevard on Thursday, creating a scene of carnage, and there was a separate attack in the nearby town of Cambrils.
Barcelona are in a desperate hunt find a worthy replacement for Neymar, who left Camp Nou last month for French club Paris Saint-Germain in a world record transfer fee.
Spurs, who finished runners-up to Antonio Conte`s champions, were unbeaten at White Hart Lane last season but managed just one win from five outings at Wembley, where they played in the Champions League group stage and lost in the FA Cup semi-final to Chelsea 4-2.
The 27-year-old penned a five-year contract worth a reported £100,000 a week to become Everton`s record signing, topping the £31.8 million they paid Chelsea for Romelu Lukaku in 2014.
Sanchez, 28, is currently in the final year of his contract. He has been linked with a move to Paris St Germain in the current transfer window.
Among the many positives for United, Nemanjan Matic's man-of-the-match performance was a highlight in midfield.
Tottenham capitalised by scoring through Alli and then Ben Davies to open their Premier League campaign with a comfortable three points at St James' Park.
New signing Alvaro Morata from Real Madrid came on to pull one back midway through the second half and then provided an assist for David Luiz.
The former England captain rejoined his boyhood club last month after 13 years with Manchester United and he instantly looked at home.
Barcelona have had two bids rejected by Liverpool for Coutinho, who is keen to move to Spain, according to British media reports.
Former Liverpool captain Jamie Carragher criticised the club's defensive system and pointed the finger at their German coach.
Morata came to Stamford Bridge as a replacement for out-of-favour Diego Costa, who has been told he can leave the club.
The Reds had rejected a 100 million Euros bid from Barcelona for the 25-year-old, who is out of Saturday's trip to Watford with injury.
Chelsea`s 93 points was the second highest total since the Premier League began in 1992 and they became the first team to register 30 victories in one season.
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