We love sports. -or We love this/that sport. (Meaning a specific one) -or (the less used but still acceptable) We love the sport of basketball.
In north American English, "sport" is rarely used in the singular except when speaking about a sport in particular. Otherwise it's pretty much always "sports".
English plurals sometimes correspond to Russian singulars (e.g. Maths — матема́тика, statistics — стати́стика).