Is There a Correlation between pre-season results/performances and the actual season?

Friendlies
As part of their pre-season preparations, Tottenham held a training camp in Spain, along with numerous friendlies, in July.[18] Their first friendly, against local side Tavernes, saw Spurs stroll to an 8–0 success, with Giovanni Dos Santos scoring his first goals for the clubs,[19] Tottenham then faced two of Juande Ramos' former teams in CD Dénia and Hércules. Spurs beat Dénia 4–2[20] and then curtailed the Spanish section of their preparations with a 1–1 with Hércules.[21]
Tottenham returned to England to play Norwich City, recovering from being a goal down to win 5–1, with Darren Bent netting four of the strikes.[22] They later played Leyton Orient, again winning 5–1 with Luka Modrić scoring his first goal for Spurs and Darren Bent scoring a hat-trick to take his tally to nine goals in five games.[23] Tottenham then embarked to Holland to play in the Feyenoord Jubilee Tournament, held in Rotterdam at the start of August, with a 2–0 victory over Celtic thanks to goals from Darren Bent and David Bentley.[24] Spurs followed this with another win, over German club Borussia Dortmund 3–0 with goals from Bent, Dos Santos and Jamie O'Hara. Tottenham Hotspur were crowned the winners of the tournament on 3 August.[25]
Tottenham finished their pre-season preparations with a 5–0 victory over Serie A giants Roma, which ensured they stayed unbeaten throughout the period, scoring thirty-three goals and conceding five in a total of seven games, with Darren Bent scoring 13 times.