REPINO/ SOCHI, Russia, June 23, 2018 (News Wires) - Poland will make changes for their match against Colombia on Sunday and start "more aggressively" in what will be a key match against opponents who also lost their opening contest, striker Dawid Kownacki said Saturday. Both sides were defeated 2-1 in their first Group H games - Poland at the hands of Senegal and Colombia to Japan - meaning another defeat is unthinkable for either of them. "We have to play more aggressively," Kownacki said. "In the Senegal match, we did not show the aggression, we did not attack the rival as we should have. We should have played sharper. This was a key mistake. "This (aggression) will be important in the match with Colombia. We have to get close to them, they have great players, a lot of individuals who can do a lot when they have control of the ball. "When we get possession we need to make faster decisions. We kept the ball too long with Senegal, we could not get into the rhythm." Assistant coach Hubert Malowiejski said some of those who disappointed against Senegal would be dropped but he did not name names. "There will be certainly be changes, it is not very likely that we will play with Colombia with the same players," Malowiejski said. "How many changes, and which positions, this decision has not been made yet. We have training sessions ahead of us, especially today's training. The skeleton of the team will remain the same but there will be changes." The results in Group H have been one of the most surprising in the World Cup with the underdogs winning both opening ties. That makes Sunday's game in Kazan a crunch match for both sides, especially as Senegal play Japan a few hours before. England must be more clinical against Panama England need to be more clinical if they are to take care of Panama on Sunday in their second game in Group G and put themselves on the brink of qualification to the knockout stage. If England beat Panama and Belgium beat or draw with Tunisia then England are through to the last 16. Gareth Southgate's side beat Tunisia 2-1 in their opening game but missed a series of first-half chances and needed a stoppage time winner from captain Harry Kane to secure the three points. Defender John Stones says England have done their homework on Panama and says it is clear where the biggest area for improvement needs to be. "Being more clinical," he told reporters, "I think we know how the games are going to play out now and who we are going to play," he said. What England have learnt from their study of the Central American side, playing in their first World Cup, is that ‘Los Canaleros' will aim to play a high-paced, physical game. Southgate has prided himself on building a team that enjoy pass and movement football. Stones says they won't change that approach because of their opponents. "It is something we have spoken about and we are going to stick to our game plan. We're going to cause them as many threats as we can using our own styles of play," he said. "That's credit to the manager and the players we have got because a lot of the players at their clubs never change their style of play in difficult situations, they keep working at it and grind down teams," he added. Southgate has an injury doubt over attacking midfielder Dele Alli, who picked up a thigh injury against Tunisia. Ruben Loftus-Cheek, who impressed as a substitute in the opener, is expected to start if Alli misses out. The England manager will also have to decide whether to stick with Raheem Sterling in attack, despite his disappointing display, or bring in the in-form Manchester United forward Marcus Rashford. Whoever Southgate opts for can expect a physical battle with Panama's strapping central defender Roman Torres. "Football is like that - you always have to impose yourself, you have to mark out your territory," said the Seattle Sounders defender. "England are a bit more direct than Belgium. They try to make use of the pace they have. We'll need to be compact and limit their space." Japan keen to flaunt attack against Senegal Japan will look to further explore their attacking potential when they face Senegal in a battle of the surprise contenders to advance to the knockout stage from Group H on Sunday. The Blue Samurai have largely worked on keeping things tight at the back since head coach Akira Nishino took over from the sacked Vahid Halilhodzic in April but saw their attack shift gears in Tuesday's 2-1 win over 10-man Colombia in Saransk. "We had to start by building the base, which is defense," midfielder Genki Haraguchi told Kyodo news agency. "But with that base in place, our ability to attack and respond to different situations is increasing." Victory saw Japan become the first Asian side to beat South American opponents at the World Cup but they are fully aware that Senegal, who scored an upset 2-1 win over Poland, could pose a sterner test at the Ekaterinburg Arena. "We must keep our feet on the ground... we have to take into account that we played against 10 men for almost 90 minutes," skipper Makoto Hasebe said, referring to Carlos Sanchez's dismissal which gave Japan the advantage against Colombia. "The next game will be a different story, we have to think about that," the defensive midfielder added. Senegal come into the match equally high on confidence after a strong defensive display in Moscow helped them neutralize the Polish attack led by Robert Lewandowski. "Senegal won due to discipline," coach Aliou Cisse, captain of the side which beat holders France in their first ever World Cup match in 2002, said. "You saw a Senegal team very solid, very compact." With 10 of their starting XI from the last match playing in Europe, including Liverpool forward Sadio Mane and Napoli defender Kalidou Koulibaly, Senegal resemble a well-drilled European side and could make life tough for Japan. Japan, who will bank on goalscorers Shinji Kagawa and Yuya Osako as well as Keisuke Honda to provide thrust going forward, are confident they have what it takes to seal a third trip to the last 16 — the furthest they have reached at a World Cup. Sunday's matches all times CLT: 2:00pm England vs Panama 5:00pm Japan vs Senegal 8:00pm Poland vs Colombia
