neck and neck

Figurative, from the image of competing horses abreast in a horse race who are so even (headed for a tie) that their necks are side-by-side.

• "The polls suggest that the candidates were neck and neck in the election."
• "It lay between me and Dick Riot madam; we were neck and neck for three miles, as hard as we could lay leg to ground, and running every inch, but at the first, I felt for him, found I had the foot […]"
• "Mr. Prendergast's Rainbow filly, watched closely by Paul Jones, took the lead, and they ran almost neck and neck until near the cords, when Paul Jones made a rush, and came home by a length."
• "[...] Mr. M. N. Rollason points out that on four-track lines on which the fast lines, in the centre, are flanked by the slow lines, and running at speed is permissible on all four, the traveller can enjoy some quite exciting experiences when trains are doing a "neck-and-neck" on adjacent lines."
• "Passing Iver, W.R. 4-6-0 No. 1012 County of Denbigh on the up "Capitals United Express" runs neck-and-neck with a parcels train headed by 4-6-0 No. 6821 Leaton Grange."

• nip and tuck

• dead heat
• photo finish