Saudi Arabia and Morocco crashed out of the first round of the World Cup on Wednesday after defeats to Uruguay and Portugal respectively. The South Americans booked their place in the knockout stage after sinking Saudi Arabia to 1-0 thanks to a Luiz Suarez goal in Rostov-on-Don. Uruguay will take on hosts Russia in their final Group A match on June 25 with top spot on the line. Russia defeated Egypt on Tuesday to send it packing. Russia and Uruguay will face one of the top two from Group B in the last 16 -- either Portugal, Spain or Iran. The 31-year-old Suarez, in his 100th appearance for Uruguay and whose previous two World Cups both ended in bans after his infamous 2010 handball against Ghana and bite on Italys Giorgio Chiellini four years later, took advantage of a goalkeeping error by Mohammed Al-Owais to put Uruguay ahead midway through the first half. Uruguay, semi-finalists eight years ago in South Africa, have now reached the knockout stage for the third straight time, while Saudi Arabia will try again in their search for a first World Cup win since 1994 in their final game against Mohamed Salahs Egypt. The Saudis managed to have plenty of early possession, although without looking overly threatening, only to gift Uruguay a 23rd-minute lead. Al-Owais -- winning only his second cap after replacing Abdullah Al-Muaiouf in goal -- completely missed a floated Carlos Sanchez corner and Suarez tapped in his 52nd international goal unmarked at the back post. That strike was Suarezs sixth World Cup goal and made him the first Uruguayan to score in three separate finals. Juan Antonio Pizzis Saudi Arabia continued to look far more assured on the ball than they did in the 5-0 drubbing by Russia on the opening day of the tournament, with Hatan Bahbri firing a wild volley over shortly after seeing a long-range effort tipped away by Fernando Muslera. Earlier, Cristiano Ronaldo scored his fourth goal of the World Cup as Portugal beat Morocco 1-0, condemning the north African team to an early exit while 2010 champions Spain prepared to play Iran. The five-time world player of the year netted with an early header to go with the hat-trick he scored to rescue the European champions against Spain in their tournament opener. The Real Madrid player, who won his fifth Champions League crown last month, now has 85 international goals -- a record for a European player. "Im happy I scored the goal but the most important thing is that we won the game. We have to think match by match in order to progress," he said. Disappointed Morocco coach Herve Renard said his side could take pride from their performances in Russia despite being out of the running to qualify for the knockout stages. "We qualified for a World Cup after 20 years and weve showed that we can play football," he said. "We do play football."