McLaren's outlook for the 2018 Formula One season appears bleak after a miserable day of testing on Tuesday which saw the car endure three mechanical failures.
Having battled some minor problems in the opening test, during which Fernando Alonso spun out, the team's follow-up outing in Barcelona began in even worse fashion.
Stoffel Vandoorne managed only 38 laps on day one as the car was halted three times, breaking down twice inside the first two hours with a battery problem and again in the afternoon after losing hydraulic pressure.
However, racing director Eric Boullier tried to put a brave face on things.
"We aren't overly concerned about the issues that we've faced," he said.
"It's obviously not the productive day we had planned, but the problems are the types of niggles that we almost hope and expect to face during testing, in order to prepare us properly for the season ahead.
"We are here to test, and today is what sometimes happens in testing. It's not ideal, and we would have liked more track time, but we're working on it, we're learning from it."
Ferrari's Sebastian Vettel was quickest on the day, the best of his 171 laps coming in at one minute 20.396 seconds.
Reigning champion Lewis Hamilton got 91 laps under his belt, with Mercedes team-mate Valtteri Bottas proving slightly quicker in the stand-out lap of the 86 he completed.
The Briton said: "It's been a good day. We've got through everything we needed and put good mileage on the car – it's been productive.
"The biggest challenge we faced was to get the tyres working properly on this new track surface. The medium tyre was difficult to get working; the soft tyre is better for warm-up, but suffered with degradation. But we are learning all the time.
"Overall it's been a good start to the second test although there is not a whole lot to say at this moment. We have not worked too much on fine-tuning the set-up as we're mostly still gathering information.
"In the next couple of days, once we get into the long-runs and some shorter qualifying-style runs, we will get a better idea of where the car is."
|Hannover 0 Bayern Munich 4: Gnabry and Kimmich star in crushing win|
|I admire Sterling – Guardiola|
|City´s strength in depth makes it hard for me – Jesus|
|Jamieson holds slender lead in Malelane|
|Kashima Antlers 3 Guadalajara 2: Comeback win sets up Real Madrid semi-final|
|Hosszu claims fourth Hangzhou gold, Le Clos beaten by Santos|
|Manchester City 3 Everton 1: Jesus at the double as City go top|
|Parker defiant on low blow claims after ending 2018 ´with a bang´|
|Alisson: Liverpool must beat Manchester United|
|Mourinho´s brutal honesty praised by Karanka|
|Fielding inspired by Bellew after overcoming setbacks to face Canelo|
|Mourinho loves being a manager ´more than ever´|
|Khawaja unconcerned by poor start to India series|
|WATCH: Dellavedova dives into media table to rescue possession|
|Christmas form could transform Man United´s season - Rashford|
|Urgent changes needed at Manchester United – Ferdinand|
|Ishant confident as Kohli carries India into day three|
|Modric takes aim at Simeone for ´constantly undermining Real Madrid´|
|Kevin Durant provides playoffs warning to inconsistent Warriors|
|A-League Review: Janjetovic off as Wanderers suffer derby defeat|
|VanVleet turnover the ´turning point´ in Raptors loss|
|Shanahan on Mahomes no-look pass: ´I do it all the time´|
|De Bruyne and Aguero return to City bench, Sterling left out of starting XI|
|Kohli and Rahane combine to thwart Australia in Perth|
|Modric cool on Madrid future beyond current deal|
|´Fatigued´ Embiid has a lot on his shoulders - Brown|
|Crespo agrees to take charge at Banfield|
|Westbrook on Murray scuffle: He was in my way|
|Liverpool v Manchester United: Van Dijk the rock on which Klopp can build a title triumph|
|Marcelo ´never´ considered Madrid exit amid Juventus links|
|Liverpool v Manchester United: Resurgent Rashford now a leader for Mourinho|
|Injury-plagued Nuggets beat Thunder to hold Western Conference lead|
|Southee takes five as Sri Lanka recover in Wellington|
|Kings troll Curry by playing clips of moon landing|
|Guardiola: Premier League title race similar to Barca-Madrid battles|
|Ovechkin joins rare NHL club with second straight hat-trick|
|Liverpool can´t be judged just on trophies – Klopp responds to Mourinho|
|Athletics´ Chapman undergoes procedure on left shoulder|
|Marcelo: Real Madrid miss Ronaldo|
|Ronaldo right about Juventus team spirit – Allegri|
|Klopp: I´m not the pope of football tactics|
|Stade beat Ospreys on emotional Chauvin tribute night|
|Ligue 1 survival bid a marathon not a sprint for Monaco, as club appoints distance runner|
|Vertonghen eyeing Spurs future beyond 2020|
|De Bruyne injuries could be a blessing for City, says Guardiola|
|Emery prepared to face Arsenal´s centre-back crisis|
|Ulster complete Scarlets double, Exeter gain Gloucester revenge|
|Sheffield United 1 West Brom 2: Baggies comeback boosts automatic promotion push|
|Del Potro back on court following knee injury|
|Canelo v Fielding: Rocky ready to write his own fairytale in New York|
|Boca part company with Schelotto after Copa Libertadores loss to River|
|Canelo v Fielding: Tale of the tape|
|Juventus defender Cancelo has knee surgery|
|Canelo v Fielding: Alvarez and Rocky make weight in New York|
|Spalletti does not fear another mid-season crisis at Inter|
|Salah headlines CAF Player of the Year shortlist as Koulibaly misses out|
|Beckham Jr. out of Titans clash|
|Lipsky hits the front at Leopard Creek|
|Pederson coy over Wentz back injury|
|Liverpool ´not really likely´ to be active in January window, reveals Klopp|
|Always on the move and unpredictable - Pavard reveals surprising choice over toughest opponent|
|We need to get back to respect - Lampard alarmed by hate in football|
|Giles returns to England to replace Strauss as director|
|Hansen has no issue with Milner-Skudder Toulon switch|
|Juventus to rest Ronaldo after Torino showdown|
|Titmus strikes gold again as world records tumble in Hangzhou|
|Malinga to captain Sri Lanka in New Zealand|
|Rivaldo would like ´excellent´ Isco at Barcelona|
|United a long way from Mourinho´s vision|
|´Klopp denies an answer!´ - Liverpool boss dismisses questions about ´world-class´ Pogba|