I'll try to find the ratings of the entire season, in which 43 foreigners played in the Italian top tier. Here's Day 1.
The foreigners in the league this season were: Alessandria: Vonlanthen, Switzerland (29 matches, 8 goals), Natteri Peru (2 matches). Atalanta: Gustavsson, Sweden (17 matches). Bologna: Pilmark Denmark (29 matches), Maschio Argentina (28 matches 8 goals), Vukas Yugoslavia (24 matches, 2 goals). Fiorentina: Lojacono Argentina (31 matches 10 goals), Montuori Argentina (30 matches, 12 goals), Julinho Brazil (28 matches 7 goals). Genoa: Abbadie Uruguay (33 matches, 13 goals), Leopardi Uruguay ( 22 matches, 1 goal). Inter: Angelillo Argentina (34 matches, 16 goals), Skoglund Sweden (22 matches, 2 goals), Massei Argentina (12 matches), Cacciavillani Uruguay (1 match). Juventus: Charles, Wales (34 matches, 28 goals), Sívori Argentina (32 matches 22 goals). Lanerossi Vicenza: Aronsson Sweden (30 matches, 10 goals), Marchi England (3 matches, 7 goals). Lazio: Selmosson Sweden (33 matches 9 goals), Humberto Tozzi Brazil (25 matches, 7 goals). Milan: Grillo Argentina (30 matches 5 goals), Cucchiaroni Argentina (27 matches, 4 goals), Liedholm Sweden (24 matches 7 goals), Schiaffino Uruguay (17 matches 3 goals). Napoli: Vinício Brazil (34 matches, 21 goals), Pesaola Argentina (26 matches 9 goals). Padova: Hamrin Sweden (30 matches, 20 goals), Rosa Argentina (30 matches, 6 goals). Roma: Da Costa Brazil (33 matches, 19 goals), Ghiggia Uruguay ( 29 matches 2 goals), G. Nordahl Sweden (4 matches, 2 goals). Sampdoria: Firmani South Africa (33 matches, 23 goals), Ockwirk Austria (33 matches 6 goals). SPAL: Sandell Sweden (24 matches, 4 goals), Sorio Brazil (9 matches 1 goal). Torino: Bonifaci France (32 matches 1 goal), Arce Paraguay (22 matches 10 goals), Tacchi Argentina (21 matches 2 goals). Udinese: Pentrelli Argentina (32 matches 7 goals), Lindskog Sweden 28 matches 13 goals. Verona: Del Vecchio Brazil (27 partite, 13 goals), Gundersen Norway (22 matches 3 goals).
The average ratings as far as foreign players are concerned after 7 rounds (min. 4 matches played): 8,36 Vinício (Na) 8,17 Hamrin (Pd) 8,12 Liedholm (Mi) 8,07 Montuori (Fi) 7,92 Pesaola (Na) 7,70 Rosa (Pd) 7,67 Ocwirk (Sa), Bonifaci (To) 7,57 Selmosson (La) 7,50 Pilmark (Bo), Sívori (Ju) 7,40 Skoglund (In), Lindskog (Ud) 7,33 Charles (Ju) 7,25 Vukas (Bo) 7,20 Abbadie (Ge) 7,08 Sandell (Sp), Pentrelli (Ud) 7,00 Ghiggia (Rm) 6,92 Grillo (Mi) 6,88 Julinho (Fi) 6,80 Aronsson (Vc) 6,75 Da Costa (Rm) 6,50 Vonlanthen (Al), Leopardi (Ge) 6,42 Gundersen (Vr) 6,36 Lojacono (Fi) 6,29 Massei (In) 6,08 Cucchiaroni (Mi) 5,92 Angelillo (In), Firmani (Sa) League table: Juventus 13; Napoli 11; Fiorentina & Roma 9; Alessandria, Inter, LR Vicenza, Lazio, Padova, Sampdoria & Verona 7; Spal & Udinese 6; Atalanta, Bologna, Milan & Torino 5; Genoa 3.