© ATP World Tour/Getty Images

Juan Martin del Potro, Rafael Nadal and Novak Djokovic stood out on different surfaces in 2018 according to the FedEx ATP Performance Zone.

Nadal, Djokovic, Delpo Among Surface Leaders Of 2018

Spaniard was again almost unbeatable on clay, while Serb excelled on both grass and hard courts

To thrive on the ATP World Tour, it's a given that players must find a way to succeed on various surfaces under different conditions throughout the year's 64 tournaments. The 2018 season was no different, according to the FedEx ATP Performance Zone. Here's a look at some of the best performers by surface this year:

Clay Courts (minimum 10 matches)
It's no surprise that Rafael Nadal was the best player on clay in 2018, winning three more titles on the surface (4) than he had losses (1). The Spaniard claimed his 11th titles at the Barcelona Open Banc Sabadell, the Rolex Monte-Carlo Masters and Roland Garros, also triumphing at the Internazionali BNL D'Italia. Nadal now owns 57 clay-court tour-level trophies, which would rank 12th all-time among title winners on all surfaces. 

While Alexander Zverev shone brightest in London, where he claimed the Nitto ATP Finals crown, the German was successful on clay as well, winning 84 per cent (21-4) of his matches on the surface.

 Player  W-L Record  Winning %
 Rafael Nadal  26-1  96.3%
 Alexander Zverev  21-4  84.0%
 Martin Klizan  16-4  80.0%
 Dominic Thiem  30-8  78.9%
 David Goffin  12-5  70.6%

Hard Courts (minimum 10 matches)
Nadal also had the ATP World Tour's best winning percentage on hard courts, but he played just three tournaments on the surface, finishing with a 14-2 record. Other Top 10 players produced standout performances on hard courts, including Juan Martin del Potro, who won back-to-back titles in Acapulco and Indian Wells (his first ATP Masters 1000 title). He also reached four hard-court finals, including the US Open. The Argentine claimed 36 wins on the surface, as did Roger Federer, who won his sixth Australian Open, the ATP 500 title in Rotterdam (where he returned to World No. 1) and his ninth title in Basel.

But among players with 30 or more hard-court match wins this season, Novak Djokovic had the best winning percentage of 83.8 per cent (31-6), despite starting the year 3-3 on the surface. The Serb won 26 of his final 28 matches, all on hard courts. During that span, he completed the Career Golden Masters at the Western & Southern Open, was victorious at the US Open and captured the Rolex Shanghai Masters crown.

 Player  W-L Record  Winning %
 Rafael Nadal  14-2  87.5%
 Novak Djokovic  31-6  83.8%
 Roger Federer  36-8  81.8%
 Juan Martin del Potro  36-9  80.0%
 Kevin Anderson  35-13  72.9%
 Alexander Zverev  35-13  72.9%

Grass Courts (minimum 5 matches)
Djokovic's resurgence after a 6-6 start to the year got underway during the grass season. He held championship point at the Fever-Tree Championships before ultimately falling against Marin Cilic, who had the third best record on the surface this year. But Djokovic used that event as a launching pad to capture his fourth Wimbledon crown.

Roger Federer won a record 18th grass-court title in 2018, triumphing at the MercedesCup in Stuttgart, while also reaching the final at the Gerry Weber Open in Halle.

 Player  W-L Record  Winning %
 Novak Djokovic  11-1  91.7%
 Roger Federer  12-2  85.7%
 Marin Cilic  6-1  85.7%
Borna Coric   5-1  83.3%
John Isner   5-1  83.3%
 Rafael Nadal  5-1  83.3%

Indoor Courts (minimum 10 matches)
While indoors is not a surface, Karen Khachanov rode great success indoors to his breakthrough in 2018. The Russian won his maiden ATP World Tour title two years ago in Chengdu. But Khachanov added three more trophies to his total this year, with all of those victories coming on indoor hard courts. Khachanov won the Open 13 Provence, the VTB Kremlin Cup and he earned his maiden ATP World Tour Masters 1000 title at the Rolex Paris Masters, finishing the season 20-4 indoors.

 Player  W-L Record  Winning %
 Karen Khachanov  20-4  83.3%
 Roger Federer  14-3  82.4%
 Novak Djokovic  8-2  80.0%
 David Goffin  8-2  80.0%%
 Kevin Anderson  13-4  76.5%

Overall
It's fitting that the Top 3 players in the year-end ATP Rankings — Nadal (No. 2), Federer (No. 3) and Djokovic (No.1)  — are also in the Top 3 in overall winning percentage in 2018. Djokovic lost just six matches after his 6-6 start, finishing with wins in 47 of his last 53 matches. Zverev, who led the ATP World Tour with 58 match wins, earned a 75.3 winning percentage.

 Player  W-L Record  Winning %
 Rafael Nadal  45-4  91.8%
 Roger Federer  48-10  82.8%
 Novak Djokovic  53-12  81.5%
 Juan Martin del Potro  47-13  78.3%
 Alexander Zverev  58-19  75.3%