Manchester City manager Sven-Goran Eriksson believes Martin Petrov will have a key role to play in the coming weeks. The £4.5million buy from Atletico Madrid made his bow in the 2-0 victory against Shrewsbury in a friendly at the New Meadow last night. The Bulgarian winger, 28, played in the first half and impressed the Swede with his contribution. Eriksson said: 'I think he did well in his first game. You can see he will be extremely useful to us. 'There was good shooting, good crosses and good set pieces from him. 'He also brings a lot of experience. He will be an important player for the club.' Eriksson is hoping to strengthen his squad before the friendly against Valencia on Saturday. Striker Valeri Bojinov, meanwhile, has claimed he is moving from Fiorentina to join fellow Bulgarian Petrov at Eastlands. There is also speculation that defenders Javi Garrido and Vedran Corluka are also about to come on board from Real Sociedad and Dinamo Zagreb as well as midfielder Elano from Shakhtar Donetsk . Eriksson, however, is keeping his cards close to his chest. 'There could be two, maybe three new faces, ' he said. 'But I do not want to comment too much. Perhaps there may be something to say soon. 'Something has to happen soon as the league is about to start.' Late goals from Bernardo Corradi and Paul Dickov gave City victory against the League Two side. Eriksson fielded different sides in each half and said: 'I had been thinking about that policy. 'It was something I needed to do in this game rather than Saturday when I will be thinking about the team for the following weekend.'