Polish national team started season with intercontinental round of the World League 2010.
At the beginning they lost twice with German team (1–3 and 0–3) in Stuttgart.
Then on 11–12 June beat hosts of final round – Argentina (3–1 and 3–2) in San Juan.
On 18–19 June played with Cuba.
Poland lost first match 2–3, but next day beat opponent 3–0.
The remaining 6 matches Polish national team played in Poland.
On 25–26 June, Poland beat Argentina (3–1 and 3–1) in Wrocław.
They moved to Atlas Arena to Łódź, where they lost both matches with Cuba (0–3 and 1–3).
Matches with Germany on 8–9 July ended Polish participated in the World League.
Poland lost 2–3 and won the next day 3–1 at Spodek in Katowice.

On 25 September 2010, players of Polish national team played their first match at the World Championship 2010.
They won all 3 matches in Pool F (first round) with Canada (3–0), Germany (3–2) and Serbia (3–1), which were held in Trieste, Italy.
In second round Poland lost their both matches with Brazil (0–3) and Bulgaria (0–3).
Poland ended Championships in place 13–18.

On 25 October 2010 after the vote of the board of Polish Volleyball Federation, Castellani was fired.
Polish national team started season with intercontinental round of the World League 2010. At the beginning they lost twice with German team (1–3 and 0–3) in Stuttgart. Then on 11–12 June beat hosts of final round – Argentina (3–1 and 3–2) in San Juan. On 18–19 June played with Cuba. Poland lost first match 2–3, but next day beat opponent 3–0. The remaining 6 matches Polish national team played in Poland. On 25–26 June, Poland beat Argentina (3–1 and 3–1) in Wrocław. They moved to Atlas Arena to Łódź, where they lost both matches with Cuba (0–3 and 1–3). Matches with Germany on 8–9 July ended Polish participated in the World League. Poland lost 2–3 and won the next day 3–1 at Spodek in Katowice.
On 25 September 2010, players of Polish national team played their first match at the World Championship 2010. They won all 3 matches in Pool F (first round) with Canada (3–0), Germany (3–2) and Serbia (3–1), which were held in Trieste, Italy. In second round Poland lost their both matches with Brazil (0–3) and Bulgaria (0–3). Poland ended Championships in place 13–18.
On 25 October 2010 after the vote of the board of Polish Volleyball Federation, Castellani was fired.
Poland men's national volleyball team