Asian markets opened mostly lower today on fears that Greece could default on its debts after talks in Brussels failed to reach a deal. Japan's Nikkei 225 is down 0.8 per cent, while the broader Topix lost 0.7 per cent. Australia's benchmark S&P/ASX 200 and South Korea's Kospi index both edged 0.2 per cent lower. Investors will be watching the Federal Reserve meeting on Wednesday for more clues about when the US central bank will raise interest rates.