Olympic champion Ismael BORRERO (CUB) headlines the May 2018 Ranking Series for Greco-Roman.
Borrero, ranked No.1 at 67kg, has accumulated 47 ranking points, which is more points than any Greco-Roman wrestler in any weight class. The Cuban star recently cruised to his fourth overall Pan American gold, picking up four technical falls and outscoring his opponents by a combined score of 40-0. Earlier this year Borrero won a gold medal at the Cerro Pelado International.
Another Cuban wrestler, Oscar PINO HINDS (130kg), a returning world bronze medalist, earned a No.1 ranking. Like Borrero, Pino Hinds claimed a gold medal at the Pan American Championships. He topped Robby SMITH (USA) to win his third consecutive continental title.
Kyrgyzstan also has a pair of top-ranked Greco-Roman wrestlers, K. ZHOLCHUBEKOV (60kg) and U. AMATOV (63kg).
Zholchubekov opened the year by winning a gold medal at the Takhti Cup and followed it up with a bronze at the Asian Championships. 
Amatov earned medals at both the Takhti Cup (bronze) and Asian Championships (silver).
2016 world champion Balint KORPASI (HUN) is the top-ranked wrestler at 72kg. He was a Cerro Pelado International champion in February and recently captured a bronze medal at the European Championships.
Returning world bronze medalist Mohammadali GERAEI (IRI) occupies the top spot at 77kg. He has been a Takhti Cup champion and Asian Championships silver medalist this year.
Another returning world bronze medalist, Roberti KOBLIASHVILI (GEO), tops the rankings at 87kg. He recently claimed a gold medal at the European Championships. 
Other top-ranked Greco-Roman wrestlers include Ekrem OZTURK (TUR) at 55kg, Daniel ALEKSANDROV (BUL) at 82kg and Orkhan NURIYEV (AZE) at 97kg.
The 2018 season is the first in which United World Wrestling is utilizing an objective ranking system. The points acquired at continental championships and select rankings series will determine the top four seeded athletes at the 2018 World Championships in October held in Budapest.
For more on the Ranking Series format, be sure to check out this article.
View all the rankings on United World Wrestling's homepage.
55kg
1. Ekrem OZTURK (TUR) // 30 Points
2. Reza KHEDRI (IRI) // 24 Points
3. Shota TANOKURA (JPN) // 22 Points
4. Eldaniz AZIZLI (AZE) // 20 Points
5. Zholaman SHARSHENBEKOV (KGZ) // 20 Points
60kg
1. K. ZHOLCHUBEKOV (KGZ) // 36 Points
2. Luis Alberto ORTA SANCHEZ (CUB) // 35 Points
3. Sergey EMELIN (RUS) // 27 Points
4. Murad MAMMADOV (AZE) // 25 Points
5. Shinobu OTA (JPN) // 23 Points
63kg
1. U. AMATOV (KGZ) // 30 Points
2. Mihai Radu MIHUT (ROU) // 28 Points
3. Stig-Andre BERGE (NOR) // 26 Points
4. Zaur KABALOEV (RUS) // 24 Points
5. Donior ISLAMOV (MDA) // 24 Points
67kg
1. Ismael BORRERO (CUB) // 47 Points
2. Almat KEBISPAYEV (KAZ) // 42 Points
3. Artem SURKOV (RUS) // 32 Points
4. Shmagi BOLKVADZE (GEO) // 30 Points
5. Karen ASLANYAN (ARM) // 28 Points
72kg
1. Balint KORPASI (HUN) // 42 Points
2. Demeu ZHADRAYEV (KAZ) // 38 Points
3. Adam KURAK (RUS) // 33 Points
4. Rasul CHUNAYEV (AZE) // 31 Points
5. Iuri LOMADZE (GEO) // 29 Points
77kg
1. Mohammadali GERAEI (IRI) // 38 Points
2. Ariel FIS BATISTA (CUB) // 34 Points
3. Roman VLASOV (RUS) // 34 Points
4. Viktor NEMES (SRB) // 32 Points
5. Tamas LORINCZ (HUN) // 30 Points
82kg
1. Daniel ALEKSANDROV (BUL) // 40 Points
2. Laszlo SZABO (HUN) // 31 Points
3. Maksim MANUKYAN (ARM) // 29 Points
4. Viktar SASUNOUSKI (BLR) // 27 Points
5. Rafig HUSEYNOV (AZE) // 25 Points
87kg
1. Roberti KOBLIASHVILI (GEO) // 33 Points
2. Bekkhan OZDOEV (RUS) // 31 Points
3. Daniel GREGORICH HECHAVARRIA (CUB) // 29 Points
4. Khussein MUTSOLGOV (KAZ) // 29 Points
5. Kristoffer Zakarias BERG (SWE) // 29 Points
97kg
1. Orkhan NURIYEV (AZE) // 42 Points
2. Cenk ILDEM (TUR) // 38 Points
3. Luillys Jose PEREZ MORA (VEN) // 34 Points
4. Artur ALEKSANYAN (ARM) // 33 Points
5. Gabriel Alejandro ROSILLO KINDELAN (CUB) // 32 Points
130kg
1. Oscar PINO HINDS (CUB) // 36 Points
2. Behnam mahdizadeh ARPATAPEH (IRI) // 34 Points
3. Lam BALINT (HUN) // 32 Points
4. Ciurariu alin ALEXUC (ROU) // 30 Points
5. Riza KAYAALP (TUR) // 27 Points
