China's Sun Yang on Sunday starts his latest battle for swimming supremacy with South Korea's Park Tae-Hwan in one of the most eagerly awaited showdowns at the Asian Games.
The day's action could also see cycling world champion Sarah Lee Wai-sze get Hong Kong's first Games medal and Palestine reach the second round of the football tournament.
Twenty-four gold medals will be decided on the second day of competition as the Games pace slowly cranks up, with five of them in judo.
London Olympics double gold medalist Sun, 22, and Park, 24, South Korea's first Olympic swimming champion in 2008, will have three duels in Incheon starting with the 200 metres -- one of six titles to be decided in the pool Sunday.
Sun, the bad boy that Chinese swimming just cannot live without, is seeking to prove that his Korean rival is yesterday's man.
Sun has Asian 200m record of 1min 44.47sec, but he is just back from a six-month suspension for driving his Porsche without a licence.
Park has home advantage -- the Incheon swimming arena is even named after him -- and he has been in hot form this year.
The rivals shared the silver medal in the London Olympics 200m race, spicing up Sunday's race even more. Look out also for Japan's Kosuke Hagino.
More Sun-Park fireworks follow this week in the 400m and 1,500m, where Sun currently has the upper hand in terms of titles.
China could also spoil the day for its Hong Kong territory in the cycling.
Hong Kong's Lee, the Olympic bronze medalist, is favourite to win the women's keirin race. But she will come up against China's Zhjong Tianshi who was in the triumphant sprint cycling team in Incheon on Saturday.
The men's team pursuit will also be decided.
- Palestine football breakthrough -
Just over a month after the Palestinians agreed a truce with Israel to end a new war in Gaza, Palestine is looking to its men's football team to bring some good news.
Victory over Singapore in Group C would ensure first place and an easier 2nd round tie. They have impressively beaten Tajikistan and group favourites Oman despite being embroiled in a sexual harassment case involving one player.
Tajikistan can condemn Oman to an early exit with just a point needed to go through.
In Group A, the winners of Saudi Arabia v Malaysia will join South Korea in the second round. Both have three points, but the Saudis have a better goal difference so the Malaysians must go for a win. Top-placed South Korea take on Laos looking to extend their 100 percent record so far.
Japan, who lost to Iraq in their last match, can get through from Group D by beating Nepal. Iraq need just a draw against Kuwait to make sure they keep first place in the group.
Judo will have one of its busiest days with five of the tournament's 16 gold medals decided.
There will also be the first gymnastics title, two fencing golds, four shooting, two weightlifting and two wushu golds decided.
Source: AFP