Complex sentence: He was presented officially on the 22nd, and signed a four-year contract; in only his second match, a 1--4 loss at Sevilla FC, he suffered a severe knee injury, going on to miss seven months.
Split into simpler sentences: He was presented officially on the 22nd, and signed a four-year contract. In only his second match, a 1--4 loss at Sevilla FC, he suffered a severe knee injury, going on to miss seven months.