Germany has promised that its attack will pack a bigger punch when it faces Northern Ireland Tuesday after struggling up front in its first two Euro 2016 matches. The Germans will definitely go through to the tournament's last 16 with a win or a draw in its final Group C game but it will need to be more clinical in front of goal, having scored just twice in its two matches so far. "In attack we have not had the goal success we want," said attacking midfielder Thomas Mueller, who is fresh from his most prolific scoring season at Bayern Munich with 20 league goals. "From forwards that is what is expected and we are measured by our goalscoring abilities." Neither goal in the 2-0 opening win over Ukraine came from a forward with central defender Shkodran Mustafi and holding midfielder Bastian Schweinsteiger on target. They followed that up with a goalless draw against Poland. Coach Joachim Loew must decide whether to stick with misfiring attacking midfielder Mario Goetze up front or use his only out-and-out striker Mario Gomez, top scorer in the Turkish league last season, or even deploy winger Andre Schuerrle through the middle. Germany is expected to advance comfortably from its group but Mueller warned fans they were unlikely to see a high-scoring affair against the Northern Irish. The Northern Irish are brimming with confidence after beating Ukraine 2-0 to notch their first win in a major tournament in 34 years, following a defeat by Poland in their opener. Eyes on troublesome fans as Croatia meet Spain When Croatia meets Spain in their final Euro 2016 group match Tuesday there will be as much scrutiny of developments in the stands as on the pitch. The wilder element of the Croatian supporters have caused trouble at both of the country's games so far. After the teams returned to the pitch, Croatia's players felt their concentration had been disturbed, which contributed to the Czechs scoring a late equalizer with a penalty. That means instead of already having qualified for the last 16 along with Spain, Croatia still requires a point from Tuesday's game, adding to the tension of the occasion. The Spaniards, however, have not been blameless in a tournament which has seen several incidents of bad behavior from fans. Although Spain has already qualified, it wants to win the group and meet a third-placed team in the last 16. Poland wary of wounded Ukraine Poland, bidding to reach the European Championship knockout stages for the first time, will take nothing for granted when it faces neighbor Ukraine in their final Euro 2016 Group C match Tuesday. Ukraine lost its first two games and cannot progress but Poland, second in the standings after beating Northern Ireland 1-0 in its opening match, will reach the last 16 if it overcomes its co-host of Euro 2012. Poland has not beaten Ukraine in its last five meetings, including two defeats in 2014 World Cup qualifying, and it may be without first-choice goalkeeper Wojciech Szczesny again due to a thigh injury. Turkey hopes to seize last chance Turkey has left it late to bid for a place in the knockout stage of Euro 2016 but defender Gokhan Gonul believes it still has a chance, if it can beat a buoyant Czech side in its final Group D game Tuesday. "There is a thing the Turkish national team always does, which is chasing the game until the last minute," the 31-year-old defender said. The Czechs, though, are full of confidence after fighting back from two goals down to draw with Croatia Friday. Turkey, by contrast, was lacking in bite when it lost 1-0 to Croatia in its opening game before being given a footballing lesson in a 3-0 drubbing by reigning European champions Spain. Aside from scoring its first goal of the tournament in Lens, Turkey would need other results to go its way even if it does win, while victory for the Czechs would put it on four points and in a good position to make the last 16. — Agencies