Having left Ferrari at the end of the 2018 Formula One season, Kimi Raikkonen's first session back with Sauber ended with smoke seemingly coming from his car.
Seventeen years on from his debut F1 campaign at Sauber, the Finn has returned after two spells with the Prancing Horse, the first of which included a world title triumph in 2007.
In testing in Abu Dhabi on Tuesday, two days after the conclusion of the season, Raikkonen's initially productive outing endured a premature ending.
Having completed 102 laps, Raikkonen was forced to stop at Turn 7 and called on the assistance of a nearby steward and a fire extinguisher after what looked to be smoke appeared to be coming from the back of his C37.
"In the final run, the team finished just a few minutes ahead of schedule, without compromising the test programme. The causes are still under investigation," read a Sauber statement.
The Finn was 11th fastest of the dozen drivers to take to the track, over three seconds behind the leading pace of his former Ferrari team-mate Sebastian Vettel, who posted the fastest time despite a spin and damage to his rear wing.
Lando Norris debuted for McLaren, as did Williams pair George Russell and Robert Kubica - the latter back in the sport after an eight-year absence, having suffered life-altering injuries in a rally crash in 2011.
Lance Stroll drove for Racing Point Force India, despite not yet being confirmed as having a seat for 2019, as teams tested out the new Pirelli tyres at Yas Marina Circuit.
"The purpose of this test is primarily to get a first feeling of the new tyres, with the impressions of the last weekend of racing still fresh in our minds, which gave us the possibility to compare," said Vettel.
"Unfortunately, today we lost some track time to repair work, but overall I think there were no major surprises as these tyres seem to work and to be fairly similar to the ones we used this season.
"Now we'll see how the new regulations for 2019 affect the speed of all cars and how they work in combination with the tyres, also depending on the compound choices at the various tracks."
18. Dezember 2018
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|ES Tunis 1 Guadalajara 1 (6-5 on penalties): Dhaouadi holds nerve to settle ill-tempered affair|
|Murphy lands permanent Tigers role|
|Mourinho sacked: Real Madrid´s Marcelo lauds ´great coach´ after United exit|
|Unadkat, Varun the top buys at IPL auction|
|Emery prepared to give youth a chance in north London derby|
|Tottenham extend Vertonghen contract until 2020|
|Panthers safety Reid receives seventh random drug test of 2018|
|Kovac relishing Klopp challenge in Champions League|
|Bancroft to return, teenager Lamichhane to fly the flag for Nepal in Big Bash|
|Liverpool still have plenty of work to do - Klopp|
|Messi ´never imagined´ his success after winning record fifth Golden Shoe|
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|Mourinho sacked: Klopp praises departed Manchester United boss|
|Mourinho sacked: Jose the best Manchester United manager since Ferguson - Gerrard|
|Mourinho sacked: Ferdinand calls for ´fresh ideas´ at Man United|
|Mourinho sacked: The mystique has gone as United spell ends in divorce|
|´He´s an interest not only for us but for many´ - Zola praises rumoured Chelsea target Wilson|
|Mourinho sacked: Pochettino focused on Spurs amid Manchester United rumours|
|Mendis eyes double-century for departing Samaraweera|
|Mourinho sacked: Zola expects Jose to be in another job ´soon´|
|Mourinho sacked: Five reasons it went wrong at Manchester United|
|Mourinho sacked: Jose´s Manchester United record in Opta stats|
|Mourinho sacked: Pogba, Ronaldo and Jose´s biggest bust-ups|
|Mourinho sacked: Blanc, Solskjaer - the men who could steady the United ship short-term|
|Mourinho sacked: The football world reacts|
|Mourinho sacked: What former United stars said after Liverpool loss|
|Mourinho sacked: Where next for the axed Manchester United boss?|
|UEFA to investigate alleged racist incidents at Vidi-Chelsea|
|Australia unchanged for rest of India series|
|Mourinho sacked: Pogba´s tweet a dig at departing Man United boss?|
|Newton left frustrated by shoulder injury as Panthers lose again|
|Mourinho sacked: Pochettino & Zidane lead potential Man Utd replacements|
|Mourinho sacked: Neville urges Man United to go for Pochettino|
|Boylen pleased to see Bulls react to red rag in Thunder fracas|
|Icardi and Inter ´very far´ apart in contract negotiations|
|Mourinho leaves Manchester United|
|Curry humbled by latest milestone|
|Robertson: ´Unbelievable´ Alisson will bounce back from error|
|Curry scores 15,000th regular-season point in Warriors win|
|Rams star Gurley ´day-to-day´ with knee inflammation|
|Saints poised to clinch NFC top seed after topping Panthers|
|Mathews, Mendis centuries frustrate New Zealand|
|Kohli: Relentless Australia deserved victory|
|Relief for Paine and Australia after ending Test drought|
|Australia level series with dominant win over India|
|Libertadores holders River learn group as CONMEBOL boss calls for end to violence|
|Chargers RB Gordon planning to return against Ravens|
|Kobe Bryant visit motivated Browns´ Jabrill Peppers|
|De Bruyne: Fatigue not behind injury woes|
|´That´s not my concern´ - Broncos coach Joseph on job security|
|Lowry on Leonard´s free agency: I just want him to be happy|
|Yankees give Sabathia $500K bonus despite ejection|
|Ronaldo confirmed Juventus interest in January – Mendes|
|Lakers guard Rondo to begin rehab stint in G League|
|Saiz to leave Leeds United for Getafe|
17. Dezember 2018
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|Greenwood stars as Man United end Chelsea´s FA Youth Cup dominance|
|Panthers tight end Olsen expects ´full recovery´ after surgery|
|Derby County 0 Nottingham Forest 0: Lampard´s men fourth after tense stalemate|