US President Joe Biden has said he is "disappointed" that his Chinese counterpart Xi Jinping plans to skip the upcoming G20 summit in India.

"I am disappointed... but I am going to get to see him," Mr Biden told reporters on Sunday, but did not say when that meeting may take place.

Beijing said on Monday that its premier Li Qiang would lead China's delegation at the summit in Delhi this week.

Mr Xi and Mr Biden last met at the G20 summit in Indonesia last year.

US-China ties remain tense despite a flurry of diplomatic visits from Washington this year to revive dialogue.

China's foreign ministry neither confirmed nor denied Mr Xi's attendance at the Delhi summit when asked pointedly at Monday's press briefing.

"Li Qiang will lead Chinese delegation to attend G20 summit. It's a major and important global economic forum. China has always attached importance on it and actively participated related events," a foreign ministry spokeswoman said.

But news reports, citing unnamed sources familiar with the matter, said last week that Mr Xi does not plan to attend.

The news comes amid worsening relations between China and India. Among other things, the two countries are facing off against each other along their disputed border in the Himalayan region. 0

Just last week, India protested after Beijing released a map that claims the state of Arunachal Pradesh and the Aksai Chin plateau as Chinese territory.

Mr Xi and Mr Biden may still have an opportunity to speak in November, at a meeting among leaders of the Asia Pacific Economic Cooperation in San Francisco.

About two months after the two leaders met in the Indonesian island of Bali last November, an alleged Chinese spy balloon in skies above the US punctured hopes for a re-set in bilateral relations, delaying efforts to kickstart dialogue by months.

The two countries disagree over a range of issues - Russia's invasion of Ukraine, human rights in Xinjiang and Hong Kong, territorial claims to Taiwan and the South China Sea, and economic restrictions that limit Beijing's access to high-tech components.

In an attempt to improve ties, a series of top US officials have travelled to China in recent months. They include Secretary of State Antony Blinken, Treasury Secretary Janet Yellen, and US Special Envoy for Climate John Kerry.

Meanwhile, Mr Xi continues to portray Beijing as a leader of the developing world, rallying support for an alternative to the Washington-led world order.

In a visit to South Africa last month to meet with leaders of the Brics nations, he criticised the West's "hegemony" and urged developing nations to "[shake] off the yoke of colonialism" in his speeches.

The Brics originally refers to five-nation club of developing countries, including Brazil, Russia, India, China and South Africa.

Six new countries - Argentina, Egypt, Iran, Ethiopia, Saudi Arabia and the United Arab Emirates - are set to join in January, in what's widely seen as a diplomatic win for Beijing.