Russell Martin could return to a tactic he first used in the 3-1 home win over Leeds United in the Championship last season if Southampton do not sign another striker this summer. Southampton have just days until they kick off their Premier League return against Newcastle United at St James’ Park on Saturday. Russell Martin has overseen a busy summer in which he used Southampton’s seven pre-season friendlies to try new things as well as get his players ready for the new season. The side that faced Getafe in the final friendly of the summer on Saturday is expected to very closely resemble the o…