Myanmar's Parliamentary chairman Shwe Mann from the Union Solidarity and Development Party (USDP) on Monday (Nov 9) conceded defeat in the elections.
He is the first high-profile casualty of Myanmar's landmark elections.
Mr Shwe Mann, who was running in the Bago region's Phyu township, issued a statement on Facebook congratulating his rival from the opposition National League for Democracy (NLD).
However, his defeat does not mean he is entirely out of the game as opposition leader Aung San Suu Kyi needs a President if her party wins the elections and can appoint him.
Meanwhile, opposition leader Aung San Suu Kyi, who arrived at the NLD headquarters, said: "It's too early to speak about the result. Although I can't speak about the result, I know our people will understand it."
She added: "I'll only congratulate our candidates when they can meet our people's needs. So far the result isn't confirmed yet."