Sailor · 2019–2026

Sami Grönberg

suomalainen pursiseura Hai Haj Shark

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Events: 30
Win rate: 27%
Podium rate: 47%
Typically beats: 51%
Best class ranking: #7
Longest win streak: 6

Most successful partnership: Venla Pesonen
Best trio: Tony Pesonen & Akseli Lehtola
Biggest lift: Sampo Rajala
Longest-running crew: Eetu Grönberg
Nemesis: Jaakko Tuominen
Rival: Vesa Humalisto
Best day: 8 Aug 2020
Signature result: 1st of 11

Partnerships · 12 sailors

Most successful partnership: Venla Pesonen — 4 wins · 7 podiums in 14 events together · 29% win rate

Venla Pesonen · Vanessa · Hai, Haj, Shark 14events 4 wins together · 7 podiums · 29% win rate · 8 of 68 races won Beat 64% of the fleet together(+6 vs. without) · best 1st · Jun 2020 – Jul 2023
Tony Pesonen · Vanessa · Hai, Haj, Shark 14events 3 wins together · 6 podiums · 21% win rate · 11 of 88 races won Beat 56% of the fleet together(−9 vs. without) · best 1st · Jun 2019 – Jul 2023
Eetu Grönberg · Vanessa, Zic Zac, Zic-Zac · Hai, Haj 9events 0 wins together · 2 podiums · 0% win rate · 2 of 43 races won Beat 50% of the fleet together(−15 vs. without) · best 2nd · Jul 2022 – Aug 2026
Akseli Lehtola · Vanessa · Hai, Haj 3events 1 wins together · 1 podiums · 3 events · 6 of 30 races won Beat 50% of the fleet together(−12 vs. without) · best 1st · Jun 2019 – Aug 2019
Sampo Rajala · Zic Zac, Zic-Zac · Hai 3events 1 wins together · 3 podiums · 3 events · 3 of 9 races won Beat 78% of the fleet together(+20 vs. without) · best 1st · Jun 2025 – Sep 2025
Anna Leskinen · Zic-Zac · Hai 2events 0 wins together · 0 podiums · 2 events · 0 of 8 races won Beat 52% of the fleet together · best 7th · Jul 2025 – Aug 2025
Mervi Valtanen · Zic Zac · Hai 1events 0 wins together · 0 podiums · 1 events · 0 of 5 races won Beat 54% of the fleet together · best 7th · Aug 2026 – Aug 2026
Mervi Valta · Zic-Zac · Hai 1events 0 wins together · 0 podiums · 1 events · 0 of 5 races won Beat 20% of the fleet together · best 13th · Jul 2024 – Jul 2024
Sari Turkulainen · Vanessa · Shark 1events 1 wins together · 1 podiums · 1 events · 2 of 2 races won Beat 100% of the fleet together · best 1st · Sep 2022 – Sep 2022
Markus Maksimainen · Zic-Zac · Hai 1events 0 wins together · 0 podiums · 1 events · 0 of 4 races won Beat 33% of the fleet together · best 5th · Jul 2024 – Jul 2024

Lift shows how much better this sailor finishes with that partner aboard.

Rating history

Event history · 30

Date	Event	Boat	Class	Role	Finish
22 Aug 2026	HSS 133 years Baltic Classic Masters Champagne Regatta	Zic Zac	Hai	Skipper	7th / 14
3 Jul 2026	Alfons Håkans Hangöregattan Hangon Regatta & Folkboat SM	Zic Zac	Hai	Skipper	4th / 7
3 Sep 2025	Wednesday Race	Zic Zac	Hai	Skipper	3rd / 6
23 Aug 2025	HSS 132 years Baltic Classic Masters Champagne Regatta	Zic-Zac	Hai	Skipper	12th / 32
2 Aug 2025	Napoleon Race 2025	Zic-Zac	Hai	Skipper	1st / 4
5 Jul 2025	Alfons Håkans Hangöregattan Hangon Regatta	Zic-Zac	Hai	Skipper	7th / 11
18 Jun 2025	Wednesday Race	Zic-Zac	Hai	Skipper	1st / 4
14 Jun 2025	Helsinki regatta, keelboats	Zic-Zac	Hai	Skipper	2nd / 5
26 Jul 2024	Airisto Classic Regatta 2024 – Baltic Classic Masters	Zic-Zac	Hai	Skipper	13th / 16
5 Jul 2024	Alfons Håkans HangöRegattan	Zic-Zac	Hai	Skipper	5th / 7
26 Aug 2023	BS Classic Regatta 2023	Zic-Zac	Haj	Skipper	3rd / 5
7 Jul 2023	Alfons Håkans Hangöregattan Hangon Regatta	Vanessa	Hai	Skipper	6th / 16
17 Jun 2023	Helsinki Regatta for Keelboats	Vanessa	Hai	Skipper	1st / 3
7 Sep 2022	HSS Wednesday Races / keskiviikkokisat	Vanessa	Shark	Skipper	1st / 3
31 Aug 2022	HSS Wednesday Races / keskiviikkokisat	Vanessa	Shark	Skipper	1st / 3
17 Aug 2022	HSS Wednesday Races / keskiviikkokisat	Vanessa	Shark	Skipper	1st / 6
29 Jul 2022	Hai SM 2022	Vanessa	Hai	Skipper	14th / 14
8 Jul 2022	Hangöregattan Hangon Regatta	Vanessa	Hai	Skipper	5th / 13
1 Jun 2022	HSS Wednesday Races / keskiviikkokisat	Vanessa	Shark	Skipper	2nd / 4
28 Aug 2021	BS Classic Regatta 2021	Vanessa	Haj	Skipper	5th / 9
9 Jul 2021	Evli Hangöregattan EVLI Hangon Regatta	Vanessa	Hai	Skipper	6th / 12
3 Jul 2021	Helsinki Regatta	Vanessa	Hai	Skipper	4th / 6
29 Aug 2020	BS Classic Regatta 2020	Vanessa	Haj	Skipper	3rd / 7
8 Aug 2020	Champagne Regatta	Vanessa	Hai	Skipper	1st / 10
24 Jul 2020	Hai SM 2020	Vanessa	Hai	Skipper	14th / 15

Ratings

Class	Rating	Rank	Impact
All classes Helm	254 provisional	#13869 band 9447–19679	—
Hai Helm	220 provisional	#7 band 5–8	+1.2
Haj Helm	75 provisional	#2 band 2–4	—

1 more class, not yet ranked

Shark · Helm · 7 races, 4 events · rating 152

Rank among sailors with a substantial record, all time. In brackets, the ranks this rating cannot be told apart from. Impact is the points of fleet beaten that this sailor adds.

Helm and crew

As helm	30 events	8 wins	beats 61%
As crew	0 events	0 wins	beats —

How they race

Closer	+7 pts	last race of an event vs. the rest
Comeback	−12 pts	the race after a bottom-half finish
Consistency	40%	100% = the same result every event
Small fleets	72%	of the fleet beaten

Head to head

Helm	Races	W–L
Janne Miettinen	89	15–72
Jaakko Tuominen	78	9–69
Vesa Humalisto	71	39–31
Marko Dahlberg	71	9–60
Matias Saresvuo	63	53–10
Kimmo Honkavaara	59	28–29
Pepe Jokinen	58	34–23
Jouni Hurskainen	48	41–7
Mikael Lundström	47	14–32
Petri Wilska	45	29–15
Fabian Björndahl	40	3–36
Kai Saksi	38	11–27

Most-beaten opponent: Matias Saresvuo (53–10).

Seasons

Year	Events	Wins	Beat
2026	2	0	52%
2025	6	2	73%
2024	2	0	27%
2023	3	1	72%
2022	6	3	72%
2021	3	0	48%
2020	4	1	63%
2019	4	1	44%

Boats

Vanessa · Hai, Shark, Haj · 19 events · 2019–2023
Zic-Zac · Hai, Haj · 8 events · 2023–2025
Zic Zac · Hai · 3 events · 2025–2026

Where they race

Unknown · 30 events

Is this you?

Claim it to merge duplicates and remove results that aren’t yours. Changes apply at the nightly rebuild.

Helm rating across all classes: 254, #13,869. Compiled from public results; not an official ranking.