Fernando Alonso remains the most complete driver in Formula One and should stay in the sport for the foreseeable future, according to Emerson Fittipaldi.
Alonso won the drivers' championship in 2005 and 2006 during his time at Renault, before finishing as a runner-up three times with Ferrari.
The Spaniard's returned to McLaren in 2015 has proved fruitless, with disappointing finishes of 17th and 10th at the struggling constructor.
There had been hopes that new regulations in F1 would level the playing field for the coming season, but McLaren endured more problems in pre-season and it is thought Alonso will contemplate his future with the team if he endures another campaign of struggle.
Last year, there were even rumblings that he may retire, but Fittipaldi - also a two-time world champion - expects Alonso, considered by many as one of the most gifted drivers of his generation, to continue enjoying success.
"To me, still today, Fernando Alonso is the most complete driver that's out there racing," Fittipaldi, speaking courtesy of Laureus, told Omnisport.
"He's incredible for testing and he's incredible as a racer. You know the famous phrase, when the flag drops the bulls**t stops. He's always there running very strong but sometimes the equipment is not there.
"He's a world champion and is extremely talented and very intelligent. He's going to leave a lot of legacy.
"I hope he doesn't stop. He has the physical ability to continue for many years, as long as he has the passion then he can continue for many years."
The dominance of F1 by Mercedes has gone unchallenged for the past three seasons, but Fittipaldi - a former McLaren driver - claimed the chasing pack can come back strong.
"Looking at the history of motor racing, the cycle and success of a team always happens," he added.
"Sometimes a team can be three, four or five years competing and winning.
"[But] McLaren can come back very strong, Ferrari can come back very strong, Williams can come back very strong. They've already won many world championships."
|Verratti denies giving interview about future|
|Aguero will stay at Man City – agent|
|All Blacks bring in McKenzie after Smith setback|
|Spieth grabs Travelers lead with late birdie|
|Messi at 30: Ronaldinho, Eto´o and Neymar lead birthday tributes|
|Confederations Cup Diary: Broos bristles at holiday topic, Low turns ball boy and it takes all saw-t|
|Germany through to U-21 Euros semis despite Italy defeat|
|Diego Alves´ representatives deny talk of Roma agreement|
|Springboks awaiting news on Whiteley injury|
|We´re working our a**** off to win Confederations Cup, says Mexico star Hernandez|
|Arsenal have to pay €65m for Lacazette - Lyon president Aulas|
|Former Bayern Munich striker Olic announces retirement|
|Mexico fight to the bitter end – Osorio|
|WATCH: Genius Guardiola lands stunning golf shot|
|Cherchesov hits out at ´unnamed sources´ amid Russia sack talk|
|Sensational Cilic sets up Lopez final at Queens|
|Marseille agree deal for Monaco striker Germain|
|Poels disappointed by Tour de France snub|
|Confederations Cup Social Diary: All Blacks thrill All White as Portuguese rack up milestones|
|Garcia kept in check by Bland|
|Ronaldo confident after leading Portugal to Confederations Cup semi-finals|
|Akinfeev horror-show underlines same old story for Russia|
|Germany´s B team are very good - Cameroon boss Broos under no illusions|
|Sevastova gets revenge on Garcia in Mallorca, Goerges breezes into final|
|Rampant Springboks whitewash France|
|Warrington spoil McNamara´s Super League homecoming|
|Ronaldo leads the way in Portugal procession|
|Watford snap up England U21 midfielder Hughes from Derby|
|New Zealand 0 Portugal 4: Ronaldo on target as European champions win group to reach semis|
|Mexico 2 Russia 1: Akinfeev error sends hosts crashing out|
|Federer to face Zverev in Halle final|
|Australia permutations are perfect, says Postecoglou|
|Kvitova reaches first final since injury, Muguruza beaten|
|Sevilla making ´great effort´ to re-sign Jovetic and Banega|
|Postecoglou hails Cahill as a ´great Australian who transcends sport´|
|We know each other by heart - Cavani talks up Pastore partnership|
|Hamilton snatches Baku pole from Bottas|
|Ford steps down as Sri Lanka coach|
|I do not want to continue for money – No China or MLS appeal for retired Arbeloa|
|Zarco claims maiden MotoGP pole in Assen|
|Antonio´s injury recovery on schedule for new West Ham season|
|The cat that got the seam? Pitch invader interrupts England´s World Cup opener|
|Cameroon want to honour beloved Foe|
|Brazil can win World Cup, says old tormentor Low|
|Inter ´want to loan´ Gabigol with English and Spanish clubs keen|
|Messi at 30: Garcia tips Messi to retire at Camp Nou|
|Goretzka ´carefully planning´ next move amid Arsenal links|
|Bravo! Claudio could return for Socceroos clash|
|Inter need ´men´ like Valero, says Spalletti|
|Pearce golden-point winner downs NRL leaders Storm|
|Messi at 30: The prizes that got away with Argentina|
|New Zealand 30 Lions 15: Top Opta facts|
|One of the best I´ve seen! - Hansen raves about Lions try|
|Demarai Gray set to stay at Leicester despite ´frustrating´ season|
|Germany injury worry over Liverpool´s Can|
|Stunning O´Brien try one to savour for beaten Lions|
|Lions shortcomings can be fixed, says Gatland|
|Defence won All Blacks the game - Read|
|Cameroon´s Djoum sets sights on ´big player´ Draxler|
|Mourinho will attract huge players to Man Utd, says Yorke|
|O´Mahony: Lions must be more clinical|
|Messi at 30: De Boer says much more still to come from ´best player ever seen´|
|New Zealand 30 Lions 15: The key moments|
|New Zealand 30 Lions 15: Wasted chances costly as All Blacks take opener|
|Muriel hoping for ´concrete´ transfer offer amid Atletico and Inter interest|
|Messi at 30: Leo or Cristiano? Cherish them both as time waits for no man|
|Barcelona target Verratti tells PSG: I will stay if you buy champions|
|Ireland finish tour with perfect record after Japan win|
|Messi at 30: From the Champions League to the World Cup - 10 of his best goals|
|Viral rant proves inspirational as Wallabies hold on to beat Italy|