Brazil have been forced to accelerate Neymar's rehabilitation from his broken foot but head coach Tite insists he is not placing his star forward's fitness in jeopardy at the World Cup.
The Paris Saint-Germain superstar suffered a fractured metatarsal at the end of February but marked his return to action in style with sparkling goals in Brazil's pre-tournament wins over Croatia and Austria.
A 1-1 draw in the Group E opener against Switzerland was less satisfactory and, after drawing 10 fouls over the course of a sometimes-bruising encounter, Neymar limped out of training in Sochi earlier this week with a sore ankle.
He was back with his team-mates on the practice pitch on Wednesday and took part in training at Krestovsky Stadium on the eve of Brazil's match against Costa Rica.
Asked whether it would be a problem for the 26-year-old to perform in St Petersburg on Friday, Tite replied: "No, no. He had a blow [to the ankle] but we're still in the initial project. He was out for three-and-a-half months and has just played his first game of 90 minutes.
"There is a science and we have a lot of tranquillity with that. It takes about five matches for you to be full-on and he's already sped up the process.
"There is this evolution taking place. Don't worry."
Focus. pic.twitter.com/wrvGCQPRSB— Neymar Jr (@neymarjr) June 20, 2018
Tite confirmed he would keep the same XI that started against Switzerland, with Gabriel Jesus leading the line, Willian on the right flank and Philippe Coutinho operating centrally as Neymar roves from his favoured left-sided position.
On whether the ex-Barcelona favourite was only being selected because this is a World Cup campaign, the former Corinthians coach insisted such a level of risk was not part of the equation.
"Yes, he would play [if this was not the World Cup]. It's not a sacrifice. It's an evolutionary process. You just speed up the steps," Tite added.
"We want to win. It's a World Cup but the coach is not going to pay with a player's health and be dishonest to win. That's a price that is too high to pay.
"You're going to pay the price if you're nervous and don't think about the game but there is no compromise on those values on health and honesty."
|Kerevi recommits to Wallabies, Reds|
|Lyon to ban fan for life after footage of Nazi salute emerges|
|Milan must respect opponents – Gattuso not underestimating Dudelange|
|Copa Libertadores Review: Zarate leads Boca, River draw|
|Mourinho: Dalot can play at Man United for more than 10 years|
|Johnson hoping to erase East Lake demons|
|´No question´ Fitzgerald faces Bears, says Cardinals´ Wilks|
|Rodgers says roughing the passer penalties are ´going the wrong direction´|
|Ravens fined $200,000 for violating communication policy|
|LeBron James set to star in ´Space Jam´ sequel|
|Ronaldo red card ´absurd´, says Pjanic|
|Kovac hails ´special´ Sanches after Bayern goal|
|Marcelino: Tearful Ronaldo said he did nothing wrong|
|Fernandinho takes blame for Man City´s Lyon loss|
|Lovren denies any wrongdoing after perjury charge|
|Plzen boss Vrba slams late mistakes|
|I almost scored as many as Messi - Tagliafico the unlikely hero for Ajax|
|Ronaldo deserves Ballon d´Or not Modric, says Casemiro|
|United fan Rafael - I´ve never lost at City|
|Davis explains abrupt mid-game NFL retirement: ´Football is not for me´|
|Lopes pays tribute to under-fire Lyon coach Genesio|
|Toulon´s Bastareaud handed five-week ban|
|Steelers WR Brown disciplined for missing meeting|
|Arteta refuses to make excuses for Manchester City´s Lyon loss|
|Allegri calls for VAR after Ronaldo´s contentious red card|
|Championship Review: Boro go second, Birmingham still winless|
|Lopetegui: Mariano took his chance|
|Juventus proved their quality after Ronaldo red card - Bonucci|
|Pogba ´class´ impresses Mourinho|
|Man City not Champions League favourites, insists Bernardo Silva|
|Isco calls for Modric to win Ballon d´Or after Champions League win|
|Wawrinka into last eight in St Petersburg|
|Goal hero Pogba is one of the best in the world - Shaw|
|Sane SOS can´t salvage sorry City display|
|Hoffenheim will learn lessons from Shakhtar draw, insists Nagelsmann|
|Valencia 0 Juventus 2: Pjanic hits the spot after Ronaldo sees red|
|Viktoria Plzen 2 CSKA Moscow 2: Krmencik heroics undone by late show|
|Benfica 0 Bayern Munich 2: Sanches returns to haunt his former club|
|Young Boys 0 Manchester United 3: Pogba double inspires Red Devils|
|Manchester City 1 Lyon 2: Cornet and Fekir stun Champions League favourites at home|
|Real Madrid 3 Roma 0: Isco stunner sets up winning start for Champions League holders|
|Ronaldo sent off on Champions League debut for Juve and may miss United reunion|
|Shakhtar Donetsk 2 Hoffenheim 2: Maycon denies Nagelsmann´s side|
|Ajax 3 AEK Athens 0: Tagliafico at the double in opening win|
|Dalot makes debut, Martial starts for Manchester United|
|India avenge ICC Champions Trophy loss with big win over Pakistan|
|Ronaldo makes Champions League debut for Juve|
|Lopetegui picks Navas over Courtois for Champions League clash with Roma|
|Willian very happy under Sarri after Conte row|
|Sarri deals blow to Chelsea kids´ Europa League hopes|
|Mendy out for Manchester City as Aguero makes bench|
|Cech accepts performances key to securing Arsenal stay|
|Monchi rules out Spain return amid Barcelona rumours|
|Durham skittled for 61 and 66 on the same day|
|Kane isn´t a machine – Lamela defends misfiring Spurs star|
|Hazard left out of Chelsea squad for PAOK trip|
|Tiger feels close to ending drought after achieving Tour Championship goal|
|Leno in line for Arsenal chance in Europa League|
|Gazidis leaves Arsenal in good shape, insists Emery|
|Eagles bring back WR Matthews, place Wallace on IR|
|England include Stokes, Hales and uncapped seamer Stone in ODI squad|
|Suwon Bluewings 0 Jeonbuk Motors 3 (aet, 4-2 on penalties): Quarter-final comeback ends in spot-kick|
|Australia captain Paine ready to slog it out with Pakistan|
|Nadal pulls out of China Open & Shanghai Masters with knee injury|
|Ostapenko begins Korea Open defence with victory|
|Joshua v Povetkin: How Olympic super heavyweight champions have fared|
|Liverpool ´made a point´ with PSG victory - Gomez|
|Osaka wows Tokyo crowd on WTA return|
|Excited Povetkin arrives in England for Joshua showdown|
|Kovac patience with Sanches set to reap rewards|