World Cup workers at the Ekaterinburg Arena may be able to put their feet up on Sunday as Japan and Senegal roll into town for their Group H meeting.

Both sides come into the clash high on confidence following 2-1 victories over Colombia and Poland, respectively, meaning another victory would all but guarantee a spot in the second round.

And it was not just on the field that the two nations earned praise after their opening wins, as their supporters took the time to clean up the trash around them after the games in Saransk and Moscow, making life easier for the volunteers in those stadiums.

M'Baye Niang scored what proved to be a decisive second for Senegal against Poland in sneaky fashion, returning to the field following an injury just in time to capitalize on a mix-up between Grzegorz Krychowiak and Wojciech Szczesny to round the keeper and score.

After netting his first international goal, the forward was quick to turn his attention to a meeting with the Blue Samurai as Senegal looks to reach the last 16 in only its second appearance at the finals.

"My benefit, of which you speak, is the work of a whole group," Niang said. "We must not give up and we must continue to work. Nothing is yet acquired, we must continue to work to achieve our goal.

"It's a good team. We are preparing and we will have time to study this team from Japan, which has qualities."

Japan was aided by a third-minute red card given to Colombia's Carlos Sanchez in its opening match, and defender Yuto Nagatomo believes he and his teammates must be wary of Senegal's threat on the counter.

"Their speed and physicality is something I expected, but what stood out was their discipline," he said. "They moved as a connected unit, with every piece interlocking.

"There is an impression sometimes that African teams, while having great individual talent, have a weakness when it comes to organization, but there is little sign of that [with Senegal]. Everyone has a high awareness of defense and they are outstanding on the counter-attack."

PLAYERS TO WATCH

Japan - Shinji Kagawa

It was his goal-bound effort that was handled by Sanchez for the second-fastest dismissal in World Cup history, and the Borussia Dortmund midfielder inflicted further punishment on Colombia by slotting the resulting penalty. Japan will look to him to be its creative force once more.

Senegal - Idrissa Gueye

Sadio Mane is the standout talent within this Senegal side, but Everton midfielder Gueye provides the protective shield from which a foundation can be built. He will have to be careful, though, as a yellow card against Poland means another on Sunday would rule him out of a potentially crucial final meeting with Colombia.

KEY OPTA FACTS

— No Asian nation has ever won both of its opening two games at a World Cup tournament.

— Japan has not won consecutive games at the World Cup since 2002, when it co-hosted the tournament with South Korea. On that occasion, it was in its second and third games of the group stage (vs. Russia and Tunisia).

— Senegal has conceded just five goals in its last nine matches in all competitions, with four of them coming in the second halves.

— Only two African nations have ever won both of their opening two matches to a World Cup tournament — Cameroon in 1990 and Nigeria in 1998.

— Keisuke Honda has been directly involved in six of Japan's last eight goals scored at World Cup tournaments with three goals and three assists.