Sebastian Vettel is under pressure to deliver in 2019 after failing to stop Lewis Hamilton recording back-to-back Formula One titles, says Nico Rosberg.
Vettel has finished runner-up to Hamilton in the last two seasons, both times the German seeing his title challenge wane in the second half of the year.
In 2018, Ferrari looked particularly strong early on and enjoyed an advantage over the previously dominant Mercedes.
However, the Silver Arrows' consistency proved too much as Vettel and Ferrari fell away, Hamilton winning his fifth drivers' title by 88 points.
After winning four successive titles with Red Bull from 2010, Vettel has not added to his haul at Ferrari and Rosberg believes his former rival has to produce the goods in the coming season.
"The pressure is on, absolutely," he told Sky Sports News.
"He [Vettel] was feeling it, I'm sure, already last year and especially driving for Ferrari that's where the pressure is the highest because you've got the whole country [of Italy] on you.
"He needs to improve and the team needs to improve overall. They just had too many mistakes last year because possibly they should have won it.
"They've made some major changes. They've changed [team principal Maurizio] Arrivabene and put in [Mattia] Binotto, so they've made a change in the highest position there.
"Also with Sebastian's new team-mate, [Charles] Leclerc, that could also be a very, very positive dynamic, but it could also be negative and backfire! So, it's going to be awesome to watch.
"They just need to step it up, but they can do it."
|Neuer back in Bayern team after thumb injury|
|Giggs, Scholes and Beckham met Ferguson´s standards because of Harrison – ´Class of ´92´ graduate Ca|
|Mertens upsets Kerber to set up Halep Doha decider|
|Valverde: Barcelona scared? We´re top of LaLiga!|
|North and South Korea want to co-host 2032 Olympics|
|Zaha appeal against ban dismissed|
|Chisora to work with Bellew´s former coach Coldwell|
|Valverde still unsure on Umtiti return date ahead of Lyon tie|
|Hudson-Odoi getting enough Chelsea chances, insists Zola|
|Sexton back in full Ireland training|
|Chelsea, Malmo facing UEFA charges|
|Magnificent Halep storms back to reach Qatar Open final|
|No nerves for Ferrari new boy Leclerc|
|Solskjaer´s Manchester United impact has been remarkable - Zola|
|Valverde delighted by extra responsibility of new Barcelona contract|
|Martial and Lingard injuries open the door to Gomes and Chong – Solskjaer|
|Semenya backed by South African government in IAAF challenge|
|Proteas collapse gives Sri Lanka hope in Durban|
|Wales star Halfpenny misses Scarlets match|
|Guardiola: Wigan a warning to Manchester City for Newport trip|
|Martial, Lingard out for up to three weeks|
|Milan will need helmets against Atalanta - Gattuso|
|Suso ´deserves Milan renewal´ amid Spurs & Arsenal links|
|Tuchel avoids touchline ban from FFF|
|Christian crushes Sixers to set up all-Melbourne final|
|Newport star Amond hopes glasses are raised after Otamendi reunion|
|Aaron Smith try snatches win over Chiefs for 14-man Highlanders|
|A-League Review: Melbourne City drop points again as Newcastle Jets close on top six|
|Pieters pegged back by late bogey in Perth|
|Stability, a thriving Messi and success despite poor recruitment – Why Barca are keeping Valverde|
|Jenkins unperturbed by Jones´ Wales dig|
|Pogba wasn´t happy – Rafael applauds Solskjaer´s impact on Man United players|
|Turn the stump mics up! - Moeen wants sledging televised|
|Valverde signs one-year extension at Barcelona|
|Klopp almost became Bayern coach – Hoeness|
|Barkley to Davis: Don´t ruin your reputation as one of the nicest guys in the world|
|Westbrook extends triple-double streak in Thunder´s loss to Pelicans|
|Llorente ´very satisfied´ at Tottenham|
|Dodgers´ Bellinger: Even when I´m not good, I´m still really good|
|Harvick, Logano win Can-Am Duels|
|Pelicans star Davis suffers shoulder injury|
|Thiem stays perfect in Buenos Aires, Ferrer exits|
|Spieth tied for lead at rain-hit Genesis Open|
|´Special´ Son is one of Premier League´s best, says Vertonghen|
|Team LeBron v Team Giannis by the numbers|
|Kerr fined $25k for ´verbally abusing´ official in Warriors´ loss to Trail Blazers|
|Icardi situation needs to be resolved – Martinez|
|Azpilicueta frustrated by Chelsea conceding late|
|Sarri´s Chelsea praise comes with timely warning|
|Blue Jays top prospect Guerrero unlikely to start season in MLB, says GM|
|Icardi holding his tongue following Inter captaincy snub|
|Argentina, Chile, Paraguay and Uruguay announce joint World Cup 2030 bid|
|This Week in US Sports: Murray chooses football, Bruins sustain another injury|
|In-form Medvedev and Tsonga to meet in Rotterdam|
|Lacazette says sorry for seeing red as Cech rues Arsenal´s first-leg failings|
|Pippen says LeBron lacks Jordan´s ´clutch gene´|
|Halep and Kerber stay in hunt for title in Doha|
|Spalletti lauds Icardi stand-in Martinez|
|Celtic 0 Valencia 2: Cheryshev, Sobrino put LaLiga side in control|
|Malmo 1 Chelsea 2: Barkley and Giroud earn first leg lead|
|Emery unrepentant over Ozil absence after BATE defeat|
|Inter want Icardi to stay despite stripping striker of captaincy ´for the good of the club´|
|Halep overcomes gutsy Goerges to reach last four in Doha|
|Ibrahimovic delighted Modric was rewarded for ´his year´|
|Rapid Vienna 0 Inter 1: Martinez makes up for missing Icardi|
|BATE 1 Arsenal 0: Dragun fires as Lacazette sees red|
|West Brom striker Gayle given two-game ban for diving|
|Bayern captain Neuer fit for Augsburg, Liverpool games|
|Simeone´s Atleti highlights as coach signs new deal|
|Kuchar defends $5,000 caddie payment after Mayakoba Classic win|