Nurmagomedov v Makhachev - who leads lightweight GOAT race?

When Islam Makhachev retained his lightweight title in dominant fashion in January, UFC president Dana White declared him the number one pound-for-pound fighter in the organisation.

The 33-year-old's impressive win at UFC 311 over Renato Moicano was his fourth title defence, breaking the record of his close friend, mentor and coach, Khabib Nurmagomedov.

Former UFC lightweight champion Nurmagomedov retired undefeated in 2020 with a spotless resume, having won all 29 of his fights.

The 36-year-old is considered by many as one of the greatest MMA fighters in history, but is it time Makhachev is considered in the same bracket?

BBC Sport investigates how the Dagestan pair compare and where their paths differ.

Nurmagomedov was famed for his aggressive wrestling style, taking opponents down before dominating them on the ground.

He was so confident when grappling that he would often taunt opponents, with Conor McGregor and Michael Johnson among those feeling the wrath of his words.

Such was his dominance on the canvas, just over 85% of Nurmagomedov's total significant strikes targeted the head during his career, with most of them coming from the top position on the ground.

His impressive ground game was what set him apart.

He is third on the list of most takedowns landed in UFC lightweight history. In addition, he boasts a 48% takedown accuracy.

Makhachev's takedown accuracy is 54% - but he attempted far fewer takedowns (69) than Nurmagomedov's 129.

While Nurmagomedov's style was effective, it can be argued he was one-dimensional, with Makhachev proving to be the more well-rounded mixed martial artist of the two.

Makhachev has a world-class ground game, highlighted in recent fights by submitting Dustin Poirier and Moicano, but his striking is equally as impressive.

He outstruck Poirier in their contest, knocked out Alexander Volkanovski with a head kick in 2023 and dropped Charles Oliveira with a right hand the year before.

While Nurmagomedov leaned heavily on his grappling to defeat opponents, Makhachev has more tools to choose from.

He heavily favours the head and 57% of his strikes come from a standing position, compared to just 42% of Nurmagomedov's. Just 24% of Makhachev's strikes come from a grounded position - while 54% of Nurmagomedov's are while he is grounded.

Makhachev has faced criticism from parts of the MMA world for the calibre of opponents he has faced during his title defences.

Although Volkanovski is world class, he moved up from featherweight for both bouts, while Moicano was a last-minute replacement for the injured Arman Tsarukyan and was 10th in the UFC lightweight rankings.

He does hold victories over former champion Oliveira and Poirier, however.

For Nurmagomedov, the combined record of his opponents at the time of fighting them is 81 wins, 13 losses, one draw and one no-contest, while Makhachev's rivals had 109 wins, 23 losses and two no-contests between them.

Nurmagomedov, meanwhile, has title defences against McGregor, Poirier and Justin Gaethje, but it is the manner in which he won those fights that is impressive.

He largely dominated all three before finishing them, while against Gaethje he pre-planned to win via a triangle choke because he wanted to put the American to sleep rather than make him submit, out of respect.

What Nurmagomedov will always have over Makhachev is the rare feat of retiring undefeated.

Makhachev's solitary blemish on his 28-fight record is a knockout defeat by Adriano Martins in 2015.

But Makhachev does have opportunities in the UFC to accomplish things Nurmagomedov never did.

He already holds the record for the longest winning streak in UFC history at lightweight with 15, putting him one win away from equalling middleweight legend Anderson Silva's all-time record of 16 consecutive victories.

Only the last 13 of Nurmagomedov's fights came in the UFC, with his previous 16 contested in different promotions.

Makhachev has also said he wants to win a title in another weight class - something Nurmagomedov never did - even suggesting he could become the first triple champion in UFC history.

It's up for debate whether Makhachev has already surpassed Nurmagomedov's accomplishments.

But while his mentor's MMA career ended at aged 32, Makhachev seems still some way off his final chapter.