Daniil Medvedev believes he is in a good spot despite letting slip his chance to claim the world number one ranking at the Miami Masters, losing 6-7 (5-7) 3-6 to Hubert Hurkacz on Thursday.

Medvedev had to deal with dizziness and fatigue during the match, taking a medical timeout against the defending champion in Miami, and was disappointed he was not able to produce his best tennis.

The defeat means the 25-year-old will stay behind Novak Djokovic, who has not played on the ATP Tour since losing to Jiri Vesely back in the quarter-finals in Dubai.

Heading into the clay season, the Russian world number two is buoyant after a 4-2 record across Acapulco and Indian Wells.

"I'm kind of happy about the tournament in Miami in a way of tennis… I managed in Miami to find just a little spark to make it work," Medvedev said post-match.

"Today was not enough, but I'm happy that I saw that I'm able to do it. I'm in the right direction, so it's good."

Hurkacz will face Carlos Alcaraz, who made his second ATP 1000 semi-final after a thrilling 6-7 (5-7) 6-3 7-6 (7-5) victory against Miomir Kecmanovic.

Both Alcaraz and Kecmanovic exhibited extraordinary court coverage in a match-up between two of the more adept returners of serve on the tour, but the 18-year-old Spaniard could simply find a higher gear as points progressed.

Alcaraz played some inspired tennis to break back in the seventh game in the opening set, shifting Kecmanovic around the court to set up a stunning cross-court backhand pass for break point, before stepping in on the second serve to restore parity.

Despite Kecmanovic holding to love in his next two service games, it did not put consequent pressure on his teenage opponent, who forced a tie-break. However, Kecmaovic clawed back from a mini-break to take a riveting opening set.

Hitting 52 winners for the match, the world number 16 pulled out his best tennis of the match in Kecmanovic's opening service game of the second set, coming up with a magnificent lob on the run to set up the break.

Saving break point while serving for the set, he held out to force a deciding third. Coming back from a mini-break in the third set tie-break, Alcaraz ended the match on fitting note, scrambling to the net to slice past Kecmanovic at the end of a frenetic rally.

Emerging Spanish star Carlos Alcaraz continued his rise with a 7-5 6-3 upset of third seed Stefanos Tsitsipas to reach the Miami Masters quarter-finals on Tuesday.

The 18-year-old, who reached last year's US Open final eight after beating Tsitsipas in the third round, proved too good again for the Greek in one hour and 50 minutes.

Alcaraz reached last week's Indian Wells semi-finals and is now 15-2 on the season, with the win setting up a clash with Serbian Miomir Kecmanovic who upset last week's Indian Wells champion Taylor Fritz 3-6 6-1 6-4.

Tsitsipas broke the Spaniard in the sixth game and led 5-2 before Alcaraz reeled off seven straight games to sensationally take the first set.

Alcaraz surged ahead in the second set, with his defence and speed leaving Tsitsipas short on answers.

The Spaniard, who saved seven of eight break points throughout the match, converted his fourth match point for victory.

"It was really, really tough. He was playing unbelievable," Alcaraz said after the match. "All I can say is I fought until the last ball in the first set [to] come back."

Ninth seed Jannik Sinner won 7-6 (7-3) 6-3 over enigmatic Australian Nick Kyrgios, who had a furious outburst directed at umpire Carlos Bernardes.

The Australian was heard to label Bernardes "an absolute clown" and continued to berate the umpire late in the first set, leading to a code violation and two penalties.

Kyrgios completely lost his cool, demanding to speak to a tournament official before smashing his racquet early in the second set, leading to a game penalty as well.

Sinner will next take on Argentine Francisco Cerundolo after he defeated 28th seed Francis Tiafoe lost 6-7 (2-7) 7-6 (7-3) 6-2.

Top seed Daniil Medvedev made light work of Jenson Brooksby 7-5 6-1 to set up a quarter-final showdown with reigning champion Hubert Hurkacz who won 7-6 (7-3) 6-2 over Lloyd Harris. Medvedev will return to the top of the ATP rankings if he wins their quarter-final.

Second seed Alexander Zverev got past Thanasi Kokkinakis 6-4 6-4 and will meet sixth seed Casper Ruud in the last eight, after the Norwegian won 6-3 6-4 over Briton Cameron Norrie.

The Miami Masters' top seed, Daniil Medvedev, had no problems making his way past Spain's Pedro Martinez 6-3 6-4 to earn his spot in the fourth round.

Serving was the story of the match as the world number two tallied up 14 aces to his unseeded opponent's zero, and only allowed Martinez to see five second serves in the opening set, with Zverev winning all five. Overall, Zverev won 20 of 24 points on serve in the first set.

The second set was more competitive, with Martinez even breaking back after Zverev jumped ahead and looked to coast to victory, but he could not hold off the Russian down the stretch.

Medvedev will play American Jenson Brooksby in his fourth-round matchup after he won a hard-fought 6-3 5-7 6-4 struggle against 15 seed Roberto Bautista Agut.

In a razor-close contest, Brooksby was just slightly better throughout, winning 60 per cent of his service points compared to the Spaniard's 59 per cent, as well as winning 41 per cent of return points compared to Bautista Agut's 40 per cent.

Fresh off his Indian Wells Masters triumph over Rafael Nadal, Taylor Fritz kept his good form going with a 7-6 (7-2) 6-4 win against American compatriot Tommy Paul.

Fritz, who is now up to world number 13, did not have his serve broken all day, winning 81 per cent of his successful first serves (30-37), while also capitalising on the only two break points he saw.

14 seed Carlos Alcaraz only needed two sets to get past 21 seed Marin Cilic 6-4 6-4, creating nine break point opportunities to Cilic's one, which was saved.

In the late session, and in a meeting of rapidly rising prospects, 22-year-old Serbian Miomir Kecmanovic pulled off an upset 7-6 (7-4) 6-3 win over 21-year-old American Sebastian Korda.

Meanwhile, three seed Stefano Tsitsipas was too much for Australian Alex de Minaur, winning 6-4 6-3 after allowing no break point opportunities in the opening set, and saving all three in the second.

Rafael Nadal extended his 2022 win streak to 20 matches and clinched a spot in his fifth Indian Wells Masters final after a thrilling three-set victory over compatriot Carlos Alcaraz on Saturday.

The fourth seed lifted in the final set to win 6-4 4-6 6-3 over 19th seed Alcaraz in three hours and 12 minutes, with Nadal to play American Taylor Fritz in Sunday's decider.

The match was played amid blustery conditions, particularly the second set, where debris flew on to the court regularly interrupting or delaying play, which appeared to impact Nadal more.

Alcaraz had more winners (41-24) but also more unforced errors (34-26), with Nadal finding another gear when it mattered in the final set.

Nadal's victory improved his record to 20-0 this season, earning him a fifth Indian Wells Masters final spot and his first since 2013. The Spaniard won the Indian Wells crown in 2007, 2009, 2013 and was runner-up in 2011.

The 35-year-old also clinched a berth in his 53rd Masters final, keeping him on track for a 37th title at this level. 

The 21-time major winner claimed the decisive break in the eighth game of the third set after a physio break for treatment on his back, before serving out to-love for victory.

"In the second, the conditions became crazy, honestly," Nadal said during his on-court interview. "It was not funny playing in this wind. In terms of tennis it was OK but in terms of stopping all the time, it was not good.

"In the third I think I played much better. I played much more aggressive. I am super happy. Being in the final means a lot to me."

Alcaraz had started the better to open up a 2-0 lead in the opening set, before Nadal responded emphatically.

There were five breaks in a row in the second set, including the Spanish teenager going ahead 5-4 after a game lasting almost 20 minutes, converting his seventh break point, before serving out the set.

As the conditions settled, Nadal showed more aggression, coming into the net with regularity before taking the key break in the eighth game.

American 20th seed Fritz reached his first ATP Masters 1000 final with a 7-5 6-4 victory over seventh seed Andrey Rublev in one hour and 50 minutes.

The California native is the first American male to reach the Indian Wells since John Isner in 2012.

"It's just unreal, really. It doesn't even seem real. I'm just trying to take in the moment, regroup and come back tomorrow for the final," Fritz said in his on-court interview. "But it's a dream come true."

"Today I definitely played my best match of the tournament so far. I was so much more aggressive from the ground and so much more solid [with] my ground strokes, whereas [in] other matches I was maybe playing a bit safer.

"I really tried to take it to him and impose my game today. I did it well, so that helped a lot."

Rafael Nadal and Carlos Alcaraz set up an all-Spanish semi-final at the Indian Wells Masters, after both secured wins on Thursday.

Nadal overcame a strong start and comeback from Nick Kyrgios to eventually win 7-6(6-0) 5-7 6-4 in the opening quarter-final, before Alcaraz beat defending champion Cameron Norrie 6-4 6-3.

The Spaniard extended his unbeaten run in 2022 to a staggering 19-0, but the win was not without its share of controversy against the fiery Kyrgios.

A shutout tie-break to end the first was followed by a fiery resurgence from Kyrgios, before he eventually collapsed in the third set and nearly hit a ball kid at the end of the match, when the 26-year-old smashed his racquet in frustration before it bounced up dangerously.

Similarly to his fourth-round win over Reilly Opelka, Nadal used all of his tactical nous to nullify Kyrgios’ serve and power, frustrating his opponent to eventually claim the victory.

"It's difficult to play against him [Kyrgios], always tough because he changes the dynamic of the point very quick and his serve is huge, especially the first serve," Nadal said afterwards.

"I think I played a good third set. Returning better, I was solid with the serve. I just suffered in one game with my serve.

"Nick is one of these kinds of players that you’re going to have problems when he’s motivated."

It was a carbon copy of recent matches between the two, with Nadal eventually waiting for Kygrios’ collapse and pouncing. He now leads their head-to-head battle 6-3.

The win set up an exciting match-up with Spanish starlet Alcaraz, who was brimming with confidence against Norrie in the night game.

The 18-year-old gave the Indian Wells defending champion problems with his characteristically flat two-handed backhand, before opening up the shoulders on the forehand side as the game progressed.

It made up for the fact he only won 59 percent of points on first serve, converting on five of his nine break point attempts.

His stroke play from the baseline was at times thrilling, particularly to set up 15-30 in the fourth game before immediately breaking Norrie back.