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."
|Salah ´unstoppable´ like Messi, says Watford boss Gracia|
|Demanding Mourinho is still special, insists Matic|
|Truex Jr sweeps stages and wins first race of 2018|
|Woods pleased with progress at Bay Hill|
|McIlroy cruises to victory at Bay Hill, where Tiger impresses|
|Dallas 3 Seattle Sounders 0: Dempsey sees red after VAR|
|Ronaldo ´from another galaxy´, says Zidane|
|Del Potro saves match points to stun Federer for Indian Wells title|
|Eusebio Sack-ristan: Real Sociedad part company with head coach|
|Fassone ready for Gattuso talks after Milan resurgence|
|Napoli 1 Genoa 0: Albiol goal maintains pressure on Juve|
|Real Madrid 6 Girona 3: Four-goal Ronaldo continues hot streak with 50th career hat-trick|
|USA boss Sarachan calls up Weah for Paraguay friendly|
|Excellent Leipzig deserved Bayern win - Heynckes|
|Marquez will sleep easily after last-ditch Qatar move|
|Conte impressed by Morata´s return to scoring form|
|I lost the game myself - Simeone accepts responsibility for Atletico Madrid defeat|
|Borussia Dortmund to delay final Stoger decision - Zorc|
|Toulouse topple leaders Montpellier|
|Puel stands by Schmeichel after FA Cup blunder|
|Neymar could be back for Coupe de France final, says Silva|
|Valverde waits on Iniesta answer as Barcelona captain considers exit|
|Magnificent Osaka claims maiden title at Indian Wells|
|Villarreal 2 Atletico Madrid 1: Unal deals LaLiga title race blow for Simeone´s men|
|Leicester City 1 Chelsea 2 (aet): Pedro and Morata send Conte´s men through|
|RB Leipzig 2 Bayern Munich 1: Werner strike seals memorable triumph|
|Gattuso demands lift from out-of-favour Kalinic|
|Karthik hits final-ball six to win Nidahas Trophy|
|Messi puts us where we are right now - Alcacer hails Barcelona superstar|
|Dovizioso holds off Marquez in Qatar to draw first blood|
|Sampaoli ´right´ to pick others - Icardi understands Argentina snub|
|Barcelona 2 Athletic Bilbao 0: Messi and Alcacer secure comfortable success|
|Hughes excited by Southampton quality|
|Nice prepared for ´likely´ Balotelli departure|
|Wales captain Jones set to miss summer Tests|
|Germany defender Halstenberg extends RB Leipzig contract|
|No offers for Roma´s Alisson, says Monchi|
|Constant compliments guarantee defeat, claims Inter boss Spalletti|
|Scoring 100th Serie A goal at Sampdoria was ´destiny´, says Icardi|
|Stoger happy with Gotze response after public criticism|
|AC Milan 3 Chievo 2: Silva spares Rossoneri once more|
|Silva confident Neymar´s future is at PSG|
|´Shameful´ PSG cannot buy a team, says Balotelli|
|All Black Squire suffers broken thumb|
|Everton goal hero Tosun glad Palace move fell through|
|Wigan Athletic 0 Southampton 2: Hojbjerg and Cedric give Hughes first win|
|Pistons got absolutely screwed - Van Gundy slams officiating in loss to Trail Blazers|
|Selection shake-up not down to Ashes drubbing - Strauss|
|Fiorentina rename training ground after late captain Astori|
|Usain Bolt issued Commonwealth Games warning to Yohan Blake|
|Borussia Dortmund 1 Hannover 0: Batshuayi the difference again for Stoger´s men|
|Nice 1 Paris Saint-Germain 2: Alves earns late victory for runaway leaders|
|Icardi 100: Inter captain´s Serie A landmark in Opta numbers|
|Sampdoria 0 Inter 5: Four-goal Icardi demolishes former side|
|Gray´s tackling ton and Italy´s woeful run - the Six Nations in Opta facts|
|Van Gaal: Heynckes can become a Bayern Munich god|
|Real Madrid without Ramos for Girona test|
|South Africa include Morris & Olivier for remainder of Australia series|
|Icardi reaches 100 Serie A goals against former club Sampdoria|
|Ireland Grand Slam heroes denied homecoming by weather|
|Cardiff trip to Derby postponed due to snow|
|Ogbonna gets Italy call as cover for doubtful Chiellini|
|Sunderland suspend Gibson after drink-driving charge|
|Manly claim record Eels thrashing, Knights win late again|
|Winning FA Cup is not important, claims Chelsea coach Conte|
|No one will be compared to me – Cristiano Ronaldo|
|LeBron James: Cavs worried about Lue health|
|F1 2018 Pre-Season Report: Red Bull|
|F1 2018 Pre-Season Report: Force India|
|Melbourne Victory 5 Central Coast Mariners 2: Berisha leads rout with hat-trick|